- An integer overflow flaw was found in the way the Linux     kernel's Frame Buffer device implementation mapped     kernel memory to user space via the mmap syscall. A     local user able to access a frame buffer device file     (/dev/fb*) could possibly use this flaw to escalate     their privileges on the system. (CVE-2013-2596,     Important)

  - It was found that the Xen hypervisor x86 CPU emulator     implementation did not correctly handle certain     instructions with segment overrides, potentially     resulting in a memory corruption. A malicious guest user     could use this flaw to read arbitrary data relating to     other guests, cause a denial of service on the host, or     potentially escalate their privileges on the host.
    (CVE-2015-2151, Important)

This update also fixes the following bugs :

  - Previously, the CPU power of a CPU group could be zero.
    As a consequence, a kernel panic occurred at     'find_busiest_group+570' with do_divide_error. The     provided patch ensures that the division is only     performed if the CPU power is not zero, and the     aforementioned panic no longer occurs.

  - Prior to this update, a bug occurred when performing an     online resize of an ext4 file system which had been     previously converted from ext3. As a consequence, the     kernel crashed. The provided patch fixes online resizing     for such file systems by limiting the blockgroup search     loop for non- extent files, and the mentioned kernel     crash no longer occurs.

The system must be rebooted for this update to take effect.

Updated kernel packages that fix two security issues and two bugs are now available for Red Hat Enterprise Linux 5.

Red Hat Product Security has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

* An integer overflow flaw was found in the way the Linux kernel's Frame Buffer device implementation mapped kernel memory to user space via the mmap syscall. A local user able to access a frame buffer device file (/dev/fb*) could possibly use this flaw to escalate their privileges on the system. (CVE-2013-2596, Important)

* It was found that the Xen hypervisor x86 CPU emulator implementation did not correctly handle certain instructions with segment overrides, potentially resulting in a memory corruption. A malicious guest user could use this flaw to read arbitrary data relating to other guests, cause a denial of service on the host, or potentially escalate their privileges on the host. (CVE-2015-2151, Important)

This update also fixes the following bugs :

* Previously, the CPU power of a CPU group could be zero. As a consequence, a kernel panic occurred at 'find_busiest_group+570' with do_divide_error. The provided patch ensures that the division is only performed if the CPU power is not zero, and the aforementioned panic no longer occurs. (BZ#1209728)

* Prior to this update, a bug occurred when performing an online resize of an ext4 file system which had been previously converted from ext3. As a consequence, the kernel crashed. The provided patch fixes online resizing for such file systems by limiting the blockgroup search loop for non-extent files, and the mentioned kernel crash no longer occurs. (BZ#1301100)

All kernel users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Integer overflow in the fb_mmap function in drivers/video/fbmem.c in the Linux kernel before 3.8.9, as     used in a certain Motorola build of Android 4.1.2 and other products, allows local users to create a read-     write memory mapping for the entirety of kernel memory, and consequently gain privileges, via crafted     /dev/graphics/fb0 mmap2 system calls, as demonstrated by the Motochopper pwn program. (CVE-2013-2596)

Note that Nessus relies on the presence of the package as reported by the vendor.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-000756 advisory.

    Integer overflow in the fb_mmap function in drivers/video/fbmem.c in the Linux kernel before 3.8.9, as     used in a certain Motorola build of Android 4.1.2 and other products, allows local users to create a read-     write memory mapping for the entirety of kernel memory, and consequently gain privileges, via crafted     /dev/graphics/fb0 mmap2 system calls, as demonstrated by the Motochopper pwn program.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2015:0695 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux     operating system.

    * A flaw was found in the way the Linux kernel's SCTP implementation     validated INIT chunks when performing Address Configuration Change     (ASCONF). A remote attacker could use this flaw to crash the system by     sending a specially crafted SCTP packet to trigger a NULL pointer     dereference on the system. (CVE-2014-7841, Important)

    * It was found that the Linux kernel's Infiniband subsystem did not     properly sanitize input parameters while registering memory regions from     user space via the (u)verbs API. A local user with access to a     /dev/infiniband/uverbsX device could use this flaw to crash the system or,     potentially, escalate their privileges on the system. (CVE-2014-8159,     Important)

    * An integer overflow flaw was found in the way the Linux kernel's Frame     Buffer device implementation mapped kernel memory to user space via the     mmap syscall. A local user able to access a frame buffer device file     (/dev/fb*) could possibly use this flaw to escalate their privileges on the     system. (CVE-2013-2596, Important)

    * It was found that the parse_rock_ridge_inode_internal() function of the     Linux kernel's ISOFS implementation did not correctly check relocated     directories when processing Rock Ridge child link (CL) tags. An attacker     with physical access to the system could use a specially crafted ISO image     to crash the system or, potentially, escalate their privileges on the     system. (CVE-2014-5471, CVE-2014-5472, Low)

    Red Hat would like to thank Mellanox for reporting the CVE-2014-8159 issue.
    The CVE-2014-7841 issue was discovered by Liu Wei of Red Hat.

    This update also fixes the following bugs:

    * Previously, certain network device drivers did not accept ethtool     commands right after they were loaded. As a consequence, the current     setting of the specified device driver was not applied and an error message     was returned. The ETHTOOL_DELAY variable has been added, which makes sure     the ethtool utility waits for some time before it tries to apply the     options settings, thus fixing the bug. (BZ#1138299)

    * During the memory allocation for a new socket to communicate to the     server, the rpciod daemon released a clean page which needed to be     committed. However, the commit was queueing indefinitely as the commit     could only be provided with a socket connection. As a consequence, a     deadlock occurred in rpciod. This update sets the PF_FSTRANS flag on the     work queue task prior to the socket allocation, and adds the     nfs_release_page check for the flag when deciding whether to make a commit     call, thus fixing this bug. (BZ#1192326)

    All kernel users are advised to upgrade to these updated packages, which     contain backported patches to correct these issues. The system must be     rebooted for this update to take effect.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Updated kernel packages that fix multiple security issues, address several hundred bugs, and add numerous enhancements are now available as part of the ongoing support and maintenance of Red Hat Enterprise Linux version 6. This is the sixth regular update.

Red Hat Product Security has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

* A NULL pointer dereference flaw was found in the way the Linux kernel's Stream Control Transmission Protocol (SCTP) implementation handled simultaneous connections between the same hosts. A remote attacker could use this flaw to crash the system. (CVE-2014-5077, Important)

* An integer overflow flaw was found in the way the Linux kernel's Frame Buffer device implementation mapped kernel memory to user space via the mmap syscall. A local user able to access a frame buffer device file (/dev/fb*) could possibly use this flaw to escalate their privileges on the system. (CVE-2013-2596, Important)

* A flaw was found in the way the ipc_rcu_putref() function in the Linux kernel's IPC implementation handled reference counter decrementing. A local, unprivileged user could use this flaw to trigger an Out of Memory (OOM) condition and, potentially, crash the system. (CVE-2013-4483, Moderate)

* It was found that the permission checks performed by the Linux kernel when a netlink message was received were not sufficient. A local, unprivileged user could potentially bypass these restrictions by passing a netlink socket as stdout or stderr to a more privileged process and altering the output of this process. (CVE-2014-0181, Moderate)

* It was found that the try_to_unmap_cluster() function in the Linux kernel's Memory Managment subsystem did not properly handle page locking in certain cases, which could potentially trigger the BUG_ON() macro in the mlock_vma_page() function. A local, unprivileged user could use this flaw to crash the system. (CVE-2014-3122, Moderate)

* A flaw was found in the way the Linux kernel's kvm_iommu_map_pages() function handled IOMMU mapping failures. A privileged user in a guest with an assigned host device could use this flaw to crash the host.
(CVE-2014-3601, Moderate)

* Multiple use-after-free flaws were found in the way the Linux kernel's Advanced Linux Sound Architecture (ALSA) implementation handled user controls. A local, privileged user could use either of these flaws to crash the system. (CVE-2014-4653, CVE-2014-4654, CVE-2014-4655, Moderate)

* A flaw was found in the way the Linux kernel's VFS subsystem handled reference counting when performing unmount operations on symbolic links. A local, unprivileged user could use this flaw to exhaust all available memory on the system or, potentially, trigger a use-after-free error, resulting in a system crash or privilege escalation. (CVE-2014-5045, Moderate)

* An integer overflow flaw was found in the way the lzo1x_decompress_safe() function of the Linux kernel's LZO implementation processed Literal Runs. A local attacker could, in extremely rare cases, use this flaw to crash the system or, potentially, escalate their privileges on the system. (CVE-2014-4608, Low)

Red Hat would like to thank Vladimir Davydov of Parallels for reporting CVE-2013-4483, Jack Morgenstein of Mellanox for reporting CVE-2014-3601, Vasily Averin of Parallels for reporting CVE-2014-5045, and Don A. Bailey from Lab Mouse Security for reporting CVE-2014-4608.
The security impact of the CVE-2014-3601 issue was discovered by Michael Tsirkin of Red Hat.

This update also fixes several hundred bugs and adds numerous enhancements. Refer to the Red Hat Enterprise Linux 6.6 Release Notes for information on the most significant of these changes, and the Technical Notes for further information, both linked to in the References.

All Red Hat Enterprise Linux 6 users are advised to install these updated packages, which correct these issues, and fix the bugs and add the enhancements noted in the Red Hat Enterprise Linux 6.6 Release Notes and Technical Notes. The system must be rebooted for this update to take effect.

Multiple vulnerabilities has been found and corrected in the Linux kernel :

The scm_set_cred function in include/net/scm.h in the Linux kernel before 3.8.11 uses incorrect uid and gid values during credentials passing, which allows local users to gain privileges via a crafted application. (CVE-2013-1979)

The nr_recvmsg function in net/netrom/af_netrom.c in the Linux kernel before 3.9-rc7 does not initialize a certain data structure, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call. (CVE-2013-3232)

net/tipc/socket.c in the Linux kernel before 3.9-rc7 does not initialize a certain data structure and a certain length variable, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call.
(CVE-2013-3235)

The rose_recvmsg function in net/rose/af_rose.c in the Linux kernel before 3.9-rc7 does not initialize a certain data structure, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call. (CVE-2013-3234)

The llcp_sock_recvmsg function in net/nfc/llcp/sock.c in the Linux kernel before 3.9-rc7 does not initialize a certain length variable and a certain data structure, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call. (CVE-2013-3233)

The llc_ui_recvmsg function in net/llc/af_llc.c in the Linux kernel before 3.9-rc7 does not initialize a certain length variable, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call. (CVE-2013-3231)

The iucv_sock_recvmsg function in net/iucv/af_iucv.c in the Linux kernel before 3.9-rc7 does not initialize a certain length variable, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call.
(CVE-2013-3229)

The irda_recvmsg_dgram function in net/irda/af_irda.c in the Linux kernel before 3.9-rc7 does not initialize a certain length variable, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call.
(CVE-2013-3228)

The caif_seqpkt_recvmsg function in net/caif/caif_socket.c in the Linux kernel before 3.9-rc7 does not initialize a certain length variable, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call. (CVE-2013-3227)

The rfcomm_sock_recvmsg function in net/bluetooth/rfcomm/sock.c in the Linux kernel before 3.9-rc7 does not initialize a certain length variable, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call. (CVE-2013-3225)

The bt_sock_recvmsg function in net/bluetooth/af_bluetooth.c in the Linux kernel before 3.9-rc7 does not properly initialize a certain length variable, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call. (CVE-2013-3224)

The ax25_recvmsg function in net/ax25/af_ax25.c in the Linux kernel before 3.9-rc7 does not initialize a certain data structure, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call. (CVE-2013-3223)

The vcc_recvmsg function in net/atm/common.c in the Linux kernel before 3.9-rc7 does not initialize a certain length variable, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call. (CVE-2013-3222)

Integer overflow in the fb_mmap function in drivers/video/fbmem.c in the Linux kernel before 3.8.9, as used in a certain Motorola build of Android 4.1.2 and other products, allows local users to create a read-write memory mapping for the entirety of kernel memory, and consequently gain privileges, via crafted /dev/graphics/fb0 mmap2 system calls, as demonstrated by the Motochopper pwn program.
(CVE-2013-2596)

arch/x86/kernel/cpu/perf_event_intel.c in the Linux kernel before 3.8.9, when the Performance Events Subsystem is enabled, specifies an incorrect bitmask, which allows local users to cause a denial of service (general protection fault and system crash) by attempting to set a reserved bit. (CVE-2013-2146)

The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows local users to gain privileges via a crafted perf_event_open system call. (CVE-2013-2094)

The ioapic_read_indirect function in virt/kvm/ioapic.c in the Linux kernel through 3.8.4 does not properly handle a certain combination of invalid IOAPIC_REG_SELECT and IOAPIC_REG_WINDOW operations, which allows guest OS users to obtain sensitive information from host OS memory or cause a denial of service (host OS OOPS) via a crafted application. (CVE-2013-1798)

Use-after-free vulnerability in arch/x86/kvm/x86.c in the Linux kernel through 3.8.4 allows guest OS users to cause a denial of service (host OS memory corruption) or possibly have unspecified other impact via a crafted application that triggers use of a guest physical address (GPA) in (1) movable or (2) removable memory during an MSR_KVM_SYSTEM_TIME kvm_set_msr_common operation. (CVE-2013-1797)

The kvm_set_msr_common function in arch/x86/kvm/x86.c in the Linux kernel through 3.8.4 does not ensure a required time_page alignment during an MSR_KVM_SYSTEM_TIME operation, which allows guest OS users to cause a denial of service (buffer overflow and host OS memory corruption) or possibly have unspecified other impact via a crafted application. (CVE-2013-1796)

The do_tkill function in kernel/signal.c in the Linux kernel before 3.8.9 does not initialize a certain data structure, which allows local users to obtain sensitive information from kernel memory via a crafted application that makes a (1) tkill or (2) tgkill system call.
(CVE-2013-2141)

Heap-based buffer overflow in the tg3_read_vpd function in drivers/net/ethernet/broadcom/tg3.c in the Linux kernel before 3.8.6 allows physically proximate attackers to cause a denial of service (system crash) or possibly execute arbitrary code via crafted firmware that specifies a long string in the Vital Product Data (VPD) data structure. (CVE-2013-1929)

The main function in tools/hv/hv_kvp_daemon.c in hypervkvpd, as distributed in the Linux kernel before 3.8-rc1, allows local users to cause a denial of service (daemon exit) via a crafted application that sends a Netlink message. NOTE: this vulnerability exists because of an incorrect fix for CVE-2012-2669. (CVE-2012-5532)

The udf_encode_fh function in fs/udf/namei.c in the Linux kernel before 3.6 does not initialize a certain structure member, which allows local users to obtain sensitive information from kernel heap memory via a crafted application. (CVE-2012-6548)

The isofs_export_encode_fh function in fs/isofs/export.c in the Linux kernel before 3.6 does not initialize a certain structure member, which allows local users to obtain sensitive information from kernel heap memory via a crafted application. (CVE-2012-6549)

net/dcb/dcbnl.c in the Linux kernel before 3.8.4 does not initialize certain structures, which allows local users to obtain sensitive information from kernel stack memory via a crafted application.
(CVE-2013-2634)

The rtnl_fill_ifinfo function in net/core/rtnetlink.c in the Linux kernel before 3.8.4 does not initialize a certain structure member, which allows local users to obtain sensitive information from kernel stack memory via a crafted application. (CVE-2013-2635)

fs/ext3/super.c in the Linux kernel before 3.8.4 uses incorrect arguments to functions in certain circumstances related to printk input, which allows local users to conduct format-string attacks and possibly gain privileges via a crafted application. (CVE-2013-1848)

The flush_signal_handlers function in kernel/signal.c in the Linux kernel before 3.8.4 preserves the value of the sa_restorer field across an exec operation, which makes it easier for local users to bypass the ASLR protection mechanism via a crafted application containing a sigaction system call. (CVE-2013-0914)

Heap-based buffer overflow in the wdm_in_callback function in drivers/usb/class/cdc-wdm.c in the Linux kernel before 3.8.4 allows physically proximate attackers to cause a denial of service (system crash) or possibly execute arbitrary code via a crafted cdc-wdm USB device. (CVE-2013-1860)

Race condition in the install_user_keyrings function in security/keys/process_keys.c in the Linux kernel before 3.8.3 allows local users to cause a denial of service (NULL pointer dereference and system crash) via crafted keyctl system calls that trigger keyring operations in simultaneous threads. (CVE-2013-1792)

The report API in the crypto user configuration API in the Linux kernel through 3.8.2 uses an incorrect C library function for copying strings, which allows local users to obtain sensitive information from kernel stack memory by leveraging the CAP_NET_ADMIN capability.
(CVE-2013-2546)

The crypto_report_one function in crypto/crypto_user.c in the report API in the crypto user configuration API in the Linux kernel through 3.8.2 does not initialize certain structure members, which allows local users to obtain sensitive information from kernel heap memory by leveraging the CAP_NET_ADMIN capability. (CVE-2013-2547)

The crypto_report_one function in crypto/crypto_user.c in the report API in the crypto user configuration API in the Linux kernel through 3.8.2 uses an incorrect length value during a copy operation, which allows local users to obtain sensitive information from kernel memory by leveraging the CAP_NET_ADMIN capability. (CVE-2013-2548)

The translate_desc function in drivers/vhost/vhost.c in the Linux kernel before 3.7 does not properly handle cross-region descriptors, which allows guest OS users to obtain host OS privileges by leveraging KVM guest OS privileges. (CVE-2013-0311)

Array index error in the __sock_diag_rcv_msg function in net/core/sock_diag.c in the Linux kernel before 3.7.10 allows local users to gain privileges via a large family value in a Netlink message. (CVE-2013-1763)

The __skb_recv_datagram function in net/core/datagram.c in the Linux kernel before 3.8 does not properly handle the MSG_PEEK flag with zero-length data, which allows local users to cause a denial of service (infinite loop and system hang) via a crafted application.
(CVE-2013-0290)

Use-after-free vulnerability in the shmem_remount_fs function in mm/shmem.c in the Linux kernel before 3.7.10 allows local users to gain privileges or cause a denial of service (system crash) by remounting a tmpfs filesystem without specifying a required mpol (aka mempolicy) mount option. (CVE-2013-1767)

The xen_iret function in arch/x86/xen/xen-asm_32.S in the Linux kernel before 3.7.9 on 32-bit Xen paravirt_ops platforms does not properly handle an invalid value in the DS segment register, which allows guest OS users to gain guest OS privileges via a crafted application.
(CVE-2013-0228)

Memory leak in drivers/net/xen-netback/netback.c in the Xen netback functionality in the Linux kernel before 3.7.8 allows guest OS users to cause a denial of service (memory consumption) by triggering certain error conditions. (CVE-2013-0217)

The Xen netback functionality in the Linux kernel before 3.7.8 allows guest OS users to cause a denial of service (loop) by triggering ring pointer corruption. (CVE-2013-0216)

The __tun_chr_ioctl function in drivers/net/tun.c in the Linux kernel before 3.6 does not initialize a certain structure, which allows local users to obtain sensitive information from kernel stack memory via a crafted application. (CVE-2012-6547)

The updated packages provides a solution for these security issues.

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2014:1392 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux     operating system.

    * A NULL pointer dereference flaw was found in the way the Linux kernel's     Stream Control Transmission Protocol (SCTP) implementation handled     simultaneous connections between the same hosts. A remote attacker could     use this flaw to crash the system. (CVE-2014-5077, Important)

    * An integer overflow flaw was found in the way the Linux kernel's Frame     Buffer device implementation mapped kernel memory to user space via the     mmap syscall. A local user able to access a frame buffer device file     (/dev/fb*) could possibly use this flaw to escalate their privileges on the     system. (CVE-2013-2596, Important)

    * A flaw was found in the way the ipc_rcu_putref() function in the Linux     kernel's IPC implementation handled reference counter decrementing.
    A local, unprivileged user could use this flaw to trigger an Out of Memory     (OOM) condition and, potentially, crash the system. (CVE-2013-4483,     Moderate)

    * It was found that the permission checks performed by the Linux kernel     when a netlink message was received were not sufficient. A local,     unprivileged user could potentially bypass these restrictions by passing a     netlink socket as stdout or stderr to a more privileged process and     altering the output of this process. (CVE-2014-0181, Moderate)

    * It was found that the try_to_unmap_cluster() function in the Linux     kernel's Memory Managment subsystem did not properly handle page locking in     certain cases, which could potentially trigger the BUG_ON() macro in the     mlock_vma_page() function. A local, unprivileged user could use this flaw     to crash the system. (CVE-2014-3122, Moderate)

    * A flaw was found in the way the Linux kernel's kvm_iommu_map_pages()     function handled IOMMU mapping failures. A privileged user in a guest with     an assigned host device could use this flaw to crash the host.
    (CVE-2014-3601, Moderate)

    * Multiple use-after-free flaws were found in the way the Linux kernel's     Advanced Linux Sound Architecture (ALSA) implementation handled user     controls. A local, privileged user could use either of these flaws to crash     the system. (CVE-2014-4653, CVE-2014-4654, CVE-2014-4655, Moderate)

    * A flaw was found in the way the Linux kernel's VFS subsystem handled     reference counting when performing unmount operations on symbolic links.
    A local, unprivileged user could use this flaw to exhaust all available     memory on the system or, potentially, trigger a use-after-free error,     resulting in a system crash or privilege escalation. (CVE-2014-5045,     Moderate)

    * An integer overflow flaw was found in the way the lzo1x_decompress_safe()     function of the Linux kernel's LZO implementation processed Literal Runs.
    A local attacker could, in extremely rare cases, use this flaw to crash the     system or, potentially, escalate their privileges on the system.
    (CVE-2014-4608, Low)

    Red Hat would like to thank Vladimir Davydov of Parallels for reporting     CVE-2013-4483, Jack Morgenstein of Mellanox for reporting CVE-2014-3601,     Vasily Averin of Parallels for reporting CVE-2014-5045, and Don A.
    Bailey from Lab Mouse Security for reporting CVE-2014-4608. The security     impact of the CVE-2014-3601 issue was discovered by Michael Tsirkin of     Red Hat.

    This update also fixes several hundred bugs and adds numerous enhancements.
    Refer to the Red Hat Enterprise Linux 6.6 Release Notes for information on     the most significant of these changes, and the Technical Notes for further     information, both linked to in the References.

    All Red Hat Enterprise Linux 6 users are advised to install these updated     packages, which correct these issues, and fix the bugs and add the     enhancements noted in the Red Hat Enterprise Linux 6.6 Release Notes and     Technical Notes. The system must be rebooted for this update to     take effect.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-001795 advisory.

    Integer overflow in the fb_mmap function in drivers/video/fbmem.c in the Linux kernel before 3.8.9, as     used in a certain Motorola build of Android 4.1.2 and other products, allows local users to create a read-     write memory mapping for the entirety of kernel memory, and consequently gain privileges, via crafted     /dev/graphics/fb0 mmap2 system calls, as demonstrated by the Motochopper pwn program.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-002336 advisory.

    Integer overflow in the fb_mmap function in drivers/video/fbmem.c in the Linux kernel before 3.8.9, as     used in a certain Motorola build of Android 4.1.2 and other products, allows local users to create a read-     write memory mapping for the entirety of kernel memory, and consequently gain privileges, via crafted     /dev/graphics/fb0 mmap2 system calls, as demonstrated by the Motochopper pwn program.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 5 / 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2014-3083 advisory.

    - ALSA: control: Don't access controls outside of protected regions (Lars-Peter Clausen)  [Orabug:
    19817787]  {CVE-2014-4653} {CVE-2014-4654} {CVE-2014-4655}
    - ALSA: control: Fix replacing user controls (Lars-Peter Clausen)  [Orabug: 19817749]  {CVE-2014-4653}     {CVE-2014-4654} {CVE-2014-4655}
    - mm: try_to_unmap_cluster() should lock_page() before mlocking (Vlastimil Babka)  [Orabug: 19817324]     {CVE-2014-3122}
    - vm: convert fb_mmap to vm_iomap_memory() helper (Linus Torvalds)  [Orabug: 19816564]  {CVE-2013-2596}
    - vm: add vm_iomap_memory() helper function (Linus Torvalds)  [Orabug: 19816564]  {CVE-2013-2596}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 6.5 Extended Update Support.

Red Hat Product Security has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

* It was found that the Linux kernel's Infiniband subsystem did not properly sanitize input parameters while registering memory regions from user space via the (u)verbs API. A local user with access to a /dev/infiniband/uverbsX device could use this flaw to crash the system or, potentially, escalate their privileges on the system.
(CVE-2014-8159, Important)

* A use-after-free flaw was found in the way the Linux kernel's SCTP implementation handled authentication key reference counting during INIT collisions. A remote attacker could use this flaw to crash the system or, potentially, escalate their privileges on the system.
(CVE-2015-1421, Important)

* An integer overflow flaw was found in the way the Linux kernel's Frame Buffer device implementation mapped kernel memory to user space via the mmap syscall. A local user able to access a frame buffer device file (/dev/fb*) could possibly use this flaw to escalate their privileges on the system. (CVE-2013-2596, Important)

* It was found that the Linux kernel's KVM implementation did not ensure that the host CR4 control register value remained unchanged across VM entries on the same virtual CPU. A local, unprivileged user could use this flaw to cause a denial of service on the system.
(CVE-2014-3690, Moderate)

* It was found that the parse_rock_ridge_inode_internal() function of the Linux kernel's ISOFS implementation did not correctly check relocated directories when processing Rock Ridge child link (CL) tags.
An attacker with physical access to the system could use a specially crafted ISO image to crash the system or, potentially, escalate their privileges on the system. (CVE-2014-5471, CVE-2014-5472, Low)

* A stack-based buffer overflow flaw was found in the TechnoTrend/Hauppauge DEC USB device driver. A local user with write access to the corresponding device could use this flaw to crash the kernel or, potentially, elevate their privileges on the system.
(CVE-2014-8884, Low)

Red Hat would like to thank Mellanox for reporting CVE-2014-8159, and Andy Lutomirski for reporting CVE-2014-3690. The CVE-2015-1421 issue was discovered by Sun Baoliang of Red Hat.

This update also fixes the following bugs :

* Previously, a NULL pointer check that is needed to prevent an oops in the nfs_async_inode_return_delegation() function was removed. As a consequence, a NFS4 client could terminate unexpectedly. The missing NULL pointer check has been added back, and NFS4 client no longer crashes in this situation. (BZ#1187638)

* Due to unbalanced multicast join and leave processing, the attempt to leave a multicast group that had not previously completed a join became unresponsive. This update resolves multiple locking issues in the IPoIB multicast code that allowed multicast groups to be left before the joining was entirely completed. Now, multicast join and leave failures or lockups no longer occur in the described situation.
(BZ#1187663)

* A failure to leave a multicast group which had previously been joined prevented the attempt to unregister from the 'sa' service.
Multiple locking issues in the IPoIB multicast join and leave processing have been fixed so that leaving a group that has completed its join process is successful. As a result, attempts to unregister from the 'sa' service no longer lock up due to leaked resources.
(BZ#1187665)

* Due to a regression, when large reads which partially extended beyond the end of the underlying device were done, the raw driver returned the EIO error code instead of returning a short read covering the valid part of the device. The underlying source code has been patched, and the raw driver now returns a short read for the remainder of the device. (BZ#1195746)

All kernel users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
89957	Scientific Linux Security Update : kernel on SL5.x i386/x86_64 (20160315)	Nessus	Scientific Linux Local Security Checks	2016/3/16	2022/9/16	high
89968	CentOS 5 : kernel (CESA-2016:0450)	Nessus	CentOS Local Security Checks	2016/3/17	2022/9/16	high
246444	Linux Distros Unpatched Vulnerability : CVE-2013-2596	Nessus	Misc.	2025/8/9	2026/7/17	high
290829	Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-000756)	Nessus	Unity Linux Local Security Checks	2026/1/16	2026/1/16	high
81906	RHEL 6 : kernel (RHSA-2015:0695)	Nessus	Red Hat Local Security Checks	2015/3/18	2024/11/4	high
79181	CentOS 6 : kernel (CESA-2014:1392)	Nessus	CentOS Local Security Checks	2014/11/12	2022/9/16	high
66975	Mandriva Linux Security Advisory : kernel (MDVSA-2013:176)	Nessus	Mandriva Local Security Checks	2013/6/25	2022/9/16	high
89956	RHEL 5 : kernel (RHSA-2016:0450)	Nessus	Red Hat Local Security Checks	2016/3/16	2022/9/16	high
78409	RHEL 6 : kernel (RHSA-2014:1392)	Nessus	Red Hat Local Security Checks	2014/10/14	2025/8/15	high
286604	Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-001795)	Nessus	Unity Linux Local Security Checks	2026/1/15	2026/1/15	high
286607	Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-002336)	Nessus	Unity Linux Local Security Checks	2026/1/15	2026/1/15	high
78580	Oracle Linux 5 / 6 : Unbreakable Enterprise kernel Security (ELSA-2014-3083)	Nessus	Oracle Linux Local Security Checks	2014/10/20	2026/2/9	high
82636	RHEL 6 : kernel (RHSA-2015:0782)	Nessus	Red Hat Local Security Checks	2015/4/8	2022/9/16	medium

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