The openSUSE Leap 42.1 kernel was updated to 4.1.26 to receive various security and bugfixes.

The following security bugs were fixed :

  - CVE-2016-1583: Prevent the usage of mmap when the lower     file system does not allow it. This could have lead to     local privilege escalation when ecryptfs-utils was     installed and /sbin/mount.ecryptfs_private was setuid     (bsc#983143).

  - CVE-2016-4565: The InfiniBand (aka IB) stack in the     Linux kernel incorrectly relies on the write system     call, which allows local users to cause a denial of     service (kernel memory write operation) or possibly have     unspecified other impact via a uAPI interface.
    (bsc#979548)

  - CVE-2016-4805: Use-after-free vulnerability in     drivers/net/ppp/ppp_generic.c in the Linux kernel     allowed local users to cause a denial of service (memory     corruption and system crash, or spinlock) or possibly     have unspecified other impact by removing a network     namespace, related to the ppp_register_net_channel and     ppp_unregister_channel functions. (bsc#980371).

  - CVE-2016-4951: The tipc_nl_publ_dump function in     net/tipc/socket.c in the Linux kernel did not verify     socket existence, which allowed local users to cause a     denial of service (NULL pointer dereference and system     crash) or possibly have unspecified other impact via a     dumpit operation. (bsc#981058).

  - CVE-2016-5244: An information leak vulnerability in     function rds_inc_info_copy of file net/rds/recv.c was     fixed that might have leaked kernel stack data.
    (bsc#983213).

  - CVE-2016-4580: The x25_negotiate_facilities function in     net/x25/x25_facilities.c in the Linux kernel did not     properly initialize a certain data structure, which     allowed attackers to obtain sensitive information from     kernel stack memory via an X.25 Call Request.
    (bsc#981267).

  - CVE-2016-0758: Tags with indefinite length could have     corrupted pointers in asn1_find_indefinite_length     (bsc#979867).

  - CVE-2016-2053: The asn1_ber_decoder function in     lib/asn1_decoder.c in the Linux kernel allowed attackers     to cause a denial of service (panic) via an ASN.1 BER     file that lacks a public key, leading to mishandling by     the public_key_verify_signature function in     crypto/asymmetric_keys/public_key.c (bnc#963762).

  - CVE-2013-7446: Use-after-free vulnerability in     net/unix/af_unix.c in the Linux kernel allowed local     users to bypass intended AF_UNIX socket permissions or     cause a denial of service (panic) via crafted epoll_ctl     calls (bnc#955654).

  - CVE-2016-3134: The netfilter subsystem in the Linux     kernel did not validate certain offset fields, which     allowed local users to gain privileges or cause a denial     of service (heap memory corruption) via an     IPT_SO_SET_REPLACE setsockopt call (bnc#971126).

  - CVE-2016-3672: The arch_pick_mmap_layout function in     arch/x86/mm/mmap.c in the Linux kernel did not properly     randomize the legacy base address, which made it easier     for local users to defeat the intended restrictions on     the ADDR_NO_RANDOMIZE flag, and bypass the ASLR     protection mechanism for a setuid or setgid program, by     disabling stack-consumption resource limits     (bnc#974308).

  - CVE-2016-4482: A kernel information leak in the usbfs     devio connectinfo was fixed, which could expose kernel     stack memory to userspace. (bnc#978401).

  - CVE-2016-4485: A kernel information leak in llc was     fixed (bsc#978821).

  - CVE-2016-4486: A kernel information leak in rtnetlink     was fixed, where 4 uninitialized bytes could leak to     userspace (bsc#978822).

  - CVE-2016-4557: A use-after-free via double-fdput in     replace_map_fd_with_map_ptr() was fixed, which could     allow privilege escalation (bsc#979018).

  - CVE-2016-4565: When the 'rdma_ucm' infiniband module is     loaded, local attackers could escalate their privileges     (bsc#979548).

  - CVE-2016-4569: A kernel information leak in the ALSA     timer via events via snd_timer_user_tinterrupt that     could leak information to userspace was fixed     (bsc#979213).

  - CVE-2016-4578: A kernel information leak in the ALSA     timer via events that could leak information to     userspace was fixed (bsc#979879).

  - CVE-2016-4581: If the first propogated mount copy was     being a slave it could oops the kernel (bsc#979913)

The following non-security bugs were fixed :

  - ALSA: hda - Add dock support for ThinkPad X260     (boo#979278).

  - ALSA: hda - Apply fix for white noise on Asus N550JV,     too (boo#979278).

  - ALSA: hda - Asus N750JV external subwoofer fixup     (boo#979278).

  - ALSA: hda - Fix broken reconfig (boo#979278).

  - ALSA: hda - Fix headphone mic input on a few Dell ALC293     machines (boo#979278).

  - ALSA: hda - Fix subwoofer pin on ASUS N751 and N551     (boo#979278).

  - ALSA: hda - Fix white noise on Asus N750JV headphone     (boo#979278).

  - ALSA: hda - Fix white noise on Asus UX501VW headset     (boo#979278).

  - ALSA: hda/realtek - Add ALC3234 headset mode for     Optiplex 9020m (boo#979278).

  - ALSA: hda/realtek - New codecs support for     ALC234/ALC274/ALC294 (boo#979278).

  - ALSA: hda/realtek - New codec support of ALC225     (boo#979278).

  - ALSA: hda/realtek - Support headset mode for ALC225     (boo#979278).

  - ALSA: pcxhr: Fix missing mutex unlock (boo#979278).

  - ALSA: usb-audio: Quirk for yet another Phoenix Audio     devices (v2) (boo#979278).

  - bluetooth: fix power_on vs close race (bsc#966849).

  - bluetooth: vhci: fix open_timeout vs. hdev race     (bsc#971799,bsc#966849).

  - bluetooth: vhci: Fix race at creating hci device     (bsc#971799,bsc#966849).

  - bluetooth: vhci: purge unhandled skbs     (bsc#971799,bsc#966849).

  - btrfs: do not use src fd for printk (bsc#980348).

  - btrfs: fix crash/invalid memory access on fsync when     using overlayfs (bsc#977198)

  - drm: qxl: Workaround for buggy user-space (bsc#981344).

  - enic: set netdev->vlan_features (bsc#966245).

  - fs: add file_dentry() (bsc#977198).

  - IB/IPoIB: Do not set skb truesize since using one     linearskb (bsc#980657).

  - input: i8042 - lower log level for 'no controller'     message (bsc#945345).

  - kabi: Add kabi/severities entries to ignore sound/hda/*,     x509_*, efivar_validate, file_open_root and dax_fault

  - kabi: Add some fixups (module, pci_dev, drm, fuse and     thermal)

  - kabi: file_dentry changes (bsc#977198).

  - kABI fixes for 4.1.22

  - mm/page_alloc.c: calculate 'available' memory in a     separate function (bsc#982239).

  - net: disable fragment reassembly if high_thresh is zero     (bsc#970506).

  - of: iommu: Silence misleading warning.

  - pstore_register() error handling was wrong -- it tried     to release lock before it's acquired, causing spinlock /     preemption imbalance. - usb: quirk to stop runtime PM     for Intel 7260 (bnc#984460).

  - Revert 'usb: hub: do not clear BOS field during reset     device' (boo#979728).

  - usb: core: hub: hub_port_init lock controller instead of     bus (bnc#978073).

  - usb: preserve kABI in address0 locking (bnc#978073).

  - usb: usbip: fix potential out-of-bounds write     (bnc#975945).

  - USB: xhci: Add broken streams quirk for Frescologic     device id 1009 (bnc#982712).

  - virtio_balloon: do not change memory amount visible via     /proc/meminfo (bsc#982238).

  - virtio_balloon: export 'available' memory to balloon     statistics (bsc#982239).

The remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2016-0100 for details.

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

  - CVE-2015-7515, CVE-2016-2184, CVE-2016-2185,     CVE-2016-2186, CVE-2016-2187, CVE-2016-3136,     CVE-2016-3137, CVE-2016-3138, CVE-2016-3140     Ralf Spenneberg of OpenSource Security reported that     various USB drivers do not sufficiently validate USB     descriptors. This allowed a physically present user with     a specially designed USB device to cause a denial of     service (crash).

  - CVE-2016-0821     Solar Designer noted that the list 'poisoning' feature,     intended to mitigate the effects of bugs in list     manipulation in the kernel, used poison values within     the range of virtual addresses that can be allocated by     user processes.

  - CVE-2016-1237     David Sinquin discovered that nfsd does not check     permissions when setting ACLs, allowing users to grant     themselves permissions to a file by setting the ACL.

  - CVE-2016-1583     Jann Horn of Google Project Zero reported that the     eCryptfs filesystem could be used together with the proc     filesystem to cause a kernel stack overflow. If the     ecryptfs-utils package is installed, local users could     exploit this, via the mount.ecryptfs_private program,     for denial of service (crash) or possibly for privilege     escalation.

  - CVE-2016-2117     Justin Yackoski of Cryptonite discovered that the     Atheros L2 ethernet driver incorrectly enables     scatter/gather I/O. A remote attacker could take     advantage of this flaw to obtain potentially sensitive     information from kernel memory.

  - CVE-2016-2143     Marcin Koscielnicki discovered that the fork     implementation in the Linux kernel on s390 platforms     mishandles the case of four page-table levels, which     allows local users to cause a denial of service (system     crash).

  - CVE-2016-3070     Jan Stancek of Red Hat discovered a local denial of     service vulnerability in AIO handling.

  - CVE-2016-3134     The Google Project Zero team found that the netfilter     subsystem does not sufficiently validate filter table     entries. A user with the CAP_NET_ADMIN capability could     use this for denial of service (crash) or possibly for     privilege escalation. Debian disables unprivileged user     namespaces by default, if locally enabled with the     kernel.unprivileged_userns_clone sysctl, this allows     privilege escalation.

  - CVE-2016-3156     Solar Designer discovered that the IPv4 implementation     in the Linux kernel did not perform the destruction of     inet device objects properly. An attacker in a guest OS     could use this to cause a denial of service (networking     outage) in the host OS.

  - CVE-2016-3157 / XSA-171     Andy Lutomirski discovered that the x86_64 (amd64) task     switching implementation did not correctly update the     I/O permission level when running as a Xen paravirtual     (PV) guest. In some configurations this would allow     local users to cause a denial of service (crash) or to     escalate their privileges within the guest.

  - CVE-2016-3672     Hector Marco and Ismael Ripoll noted that it was     possible to disable Address Space Layout Randomisation     (ASLR) for x86_32 (i386) programs by removing the stack     resource limit. This made it easier for local users to     exploit security flaws in programs that have the setuid     or setgid flag set.

  - CVE-2016-3951     It was discovered that the cdc_ncm driver would free     memory prematurely if certain errors occurred during its     initialisation. This allowed a physically present user     with a specially designed USB device to cause a denial     of service (crash) or possibly to escalate their     privileges.

  - CVE-2016-3955     Ignat Korchagin reported that the usbip subsystem did     not check the length of data received for a USB buffer.
    This allowed denial of service (crash) or privilege     escalation on a system configured as a usbip client, by     the usbip server or by an attacker able to impersonate     it over the network. A system configured as a usbip     server might be similarly vulnerable to physically     present users.

  - CVE-2016-3961 / XSA-174     Vitaly Kuznetsov of Red Hat discovered that Linux     allowed the use of hugetlbfs on x86 (i386 and amd64)     systems even when running as a Xen paravirtualised (PV)     guest, although Xen does not support huge pages. This     allowed users with access to /dev/hugepages to cause a     denial of service (crash) in the guest.

  - CVE-2016-4470     David Howells of Red Hat discovered that a local user     can trigger a flaw in the Linux kernel's handling of key     lookups in the keychain subsystem, leading to a denial     of service (crash) or possibly to privilege escalation.

  - CVE-2016-4482, CVE-2016-4485, CVE-2016-4486,     CVE-2016-4569, CVE-2016-4578, CVE-2016-4580,     CVE-2016-5243, CVE-2016-5244

    Kangjie Lu reported that the USB devio, llc, rtnetlink,     ALSA timer, x25, tipc, and rds facilities leaked     information from the kernel stack.

  - CVE-2016-4565     Jann Horn of Google Project Zero reported that various     components in the InfiniBand stack implemented unusual     semantics for the write() operation. On a system with     InfiniBand drivers loaded, local users could use this     for denial of service or privilege escalation.

  - CVE-2016-4581     Tycho Andersen discovered that in some situations the     Linux kernel did not handle propagated mounts correctly.
    A local user can take advantage of this flaw to cause a     denial of service (system crash).

  - CVE-2016-4805     Baozeng Ding discovered a use-after-free in the generic     PPP layer in the Linux kernel. A local user can take     advantage of this flaw to cause a denial of service     (system crash), or potentially escalate their     privileges.

  - CVE-2016-4913     Al Viro found that the ISO9660 filesystem implementation     did not correctly count the length of certain invalid     name entries. Reading a directory containing such name     entries would leak information from kernel memory. Users     permitted to mount disks or disk images could use this     to obtain sensitive information.

  - CVE-2016-4997 / CVE-2016-4998     Jesse Hertz and Tim Newsham discovered that missing     input sanitising in Netfilter socket handling may result     in denial of service. Debian disables unprivileged user     namespaces by default, if locally enabled with the     kernel.unprivileged_userns_clone sysctl, this also     allows privilege escalation.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2016-2574 advisory.

    - [mm] remove gup_flags FOLL_WRITE games from __get_user_pages() (Larry Woodman) [1385124] {CVE-2016-5195}
    - [net] add recursion limit to GRO (Sabrina Dubroca) [1374191] {CVE-2016-7039}
    - [kernel] audit: fix a double fetch in audit_log_single_execve_arg() (Paul Moore) [1359306]     {CVE-2016-6136}
    - [scsi] aacraid: Check size values after double-fetch from user (Maurizio Lombardi) [1369771]     {CVE-2016-6480}

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.

An update for kernel is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

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

Security Fix(es) :

* It was found that the Linux kernel's IPv6 implementation mishandled socket options. A local attacker could abuse concurrent access to the socket options to escalate their privileges, or cause a denial of service (use-after-free and system crash) via a crafted sendmsg system call. (CVE-2016-3841, Important)

* Several Moderate and Low impact security issues were found in the Linux kernel. Space precludes documenting each of these issues in this advisory. Refer to the CVE links in the References section for a description of each of these vulnerabilities. (CVE-2013-4312, CVE-2015-8374, CVE-2015-8543, CVE-2015-8812, CVE-2015-8844, CVE-2015-8845, CVE-2016-2053, CVE-2016-2069, CVE-2016-2847, CVE-2016-3156, CVE-2016-4581, CVE-2016-4794, CVE-2016-5412, CVE-2016-5828, CVE-2016-5829, CVE-2016-6136, CVE-2016-6198, CVE-2016-6327, CVE-2016-6480, CVE-2015-8746, CVE-2015-8956, CVE-2016-2117, CVE-2016-2384, CVE-2016-3070, CVE-2016-3699, CVE-2016-4569, CVE-2016-4578)

Red Hat would like to thank Philip Pettersson (Samsung) for reporting CVE-2016-2053; Tetsuo Handa for reporting CVE-2016-2847; the Virtuozzo kernel team and Solar Designer (Openwall) for reporting CVE-2016-3156;
Justin Yackoski (Cryptonite) for reporting CVE-2016-2117; and Linn Crosetto (HP) for reporting CVE-2016-3699. The CVE-2015-8812 issue was discovered by Venkatesh Pottem (Red Hat Engineering); the CVE-2015-8844 and CVE-2015-8845 issues were discovered by Miroslav Vadkerti (Red Hat Engineering); the CVE-2016-4581 issue was discovered by Eric W. Biederman (Red Hat); the CVE-2016-6198 issue was discovered by CAI Qian (Red Hat); and the CVE-2016-3070 issue was discovered by Jan Stancek (Red Hat).

Additional Changes :

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.3 Release Notes linked from the References section.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
91736	openSUSE Security Update : the Linux Kernel (openSUSE-2016-753)	Nessus	SuSE Local Security Checks	2016/6/22	2021/1/19	critical
93679	OracleVM 3.4 : Unbreakable / etc (OVMSA-2016-0100)	Nessus	OracleVM Local Security Checks	2016/9/23	2026/1/23	critical
91886	Debian DSA-3607-1 : linux - security update	Nessus	Debian Local Security Checks	2016/6/29	2021/1/11	critical
94697	Oracle Linux 7 : kernel (ELSA-2016-2574)	Nessus	Oracle Linux Local Security Checks	2016/11/11	2026/2/9	critical
95321	CentOS 7 : kernel (CESA-2016:2574)	Nessus	CentOS Local Security Checks	2016/11/28	2021/1/4	critical

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