The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2012:0743 advisory.

  - kernel: drm: integer overflow in drm_mode_dirtyfb_ioctl() (CVE-2012-0044)

  - kernel: thp:__split_huge_page() mapcount != page_mapcount BUG_ON() (CVE-2012-1179)

  - kernel: macvtap: zerocopy: vector length is not validated before pinning user pages (CVE-2012-2119)

  - kvm: device assignment page leak (CVE-2012-2121)

  - kernel: fcaps: clear the same personality flags as suid when fcaps are used (CVE-2012-2123)

  - kernel: net: insufficient data_len validation in sock_alloc_send_pskb() (CVE-2012-2136)

  - kernel: kvm: buffer overflow in kvm_set_irq() (CVE-2012-2137)

  - kernel: rds-ping cause kernel panic (CVE-2012-2372)

  - kernel: mm: read_pmd_atomic: 32bit PAE pmd walk vs pmd_populate SMP race condition (CVE-2012-2373)

Note that Nessus has not tested for these issues 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-2012:1042 advisory.

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

    This update fixes the following security issues:

    * A local, unprivileged user could use an integer overflow flaw in     drm_mode_dirtyfb_ioctl() to cause a denial of service or escalate their     privileges. (CVE-2012-0044, Important)

    * It was found that the kvm_vm_ioctl_assign_device() function in the KVM     (Kernel-based Virtual Machine) subsystem of a Linux kernel did not check if     the user requesting device assignment was privileged or not. A local,     unprivileged user on the host could assign unused PCI devices, or even     devices that were in use and whose resources were not properly claimed by     the respective drivers, which could result in the host crashing.
    (CVE-2011-4347, Moderate)

    * A flaw was found in the way the Linux kernel's XFS file system     implementation handled on-disk Access Control Lists (ACLs). A local,     unprivileged user could use this flaw to cause a denial of service or     escalate their privileges by mounting a specially-crafted disk.
    (CVE-2012-0038, Moderate)

    * It was found that the Linux kernel's register set (regset) common     infrastructure implementation did not check if the required get and set     handlers were initialized. A local, unprivileged user could use this flaw     to cause a denial of service by performing a register set operation with a     ptrace() PTRACE_SETREGSET or PTRACE_GETREGSET request. (CVE-2012-1097,     Moderate)

    * A race condition was found in the Linux kernel's memory management     subsystem in the way pmd_none_or_clear_bad(), when called with mmap_sem in     read mode, and Transparent Huge Pages (THP) page faults interacted. A     privileged user in a KVM guest with the ballooning functionality enabled     could potentially use this flaw to crash the host. A local, unprivileged     user could use this flaw to crash the system. (CVE-2012-1179, Moderate)

    Red Hat would like to thank Chen Haogang for reporting CVE-2012-0044; Sasha     Levin for reporting CVE-2011-4347; Wang Xi for reporting CVE-2012-0038; and     H. Peter Anvin for reporting CVE-2012-1097.

    This update also fixes the following bugs:

    * When a RoCE (RDMA over Converged Ethernet) adapter with active RoCE     communications was taken down suddenly (either by adapter failure or the     intentional shutdown of the interface), the ongoing RoCE communications     could cause the kernel to panic and render the machine unusable. A patch     has been provided to protect the kernel in this situation and to pass an     error up to the application still using the interface after it has been     taken down instead. (BZ#799944)

    * The fix for Red Hat Bugzilla bug 713494, released via RHSA-2011:0928,     introduced a regression. Attempting to change the state of certain     features, such as GRO (Generic Receive Offload) or TSO (TCP segment     offloading), for a 10 Gigabit Ethernet card that is being used in a     virtual LAN (VLAN) resulted in a kernel panic. (BZ#816974)

    * If a new file was created on a Network File System version 4 (NFSv4)     share, the ownership was set to nfsnobody (-2) until it was possible to     upcall to the idmapper. As a consequence, subsequent file system operations     could incorrectly use -2 for the user and group IDs for the given file,     causing certain operations to fail. In reported cases, this issue also     caused Viminfo file is not writable errors for users running Vim with     files on an NFSv4 share. (BZ#820960)

    Users should 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.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
59562	RHEL 6 : kernel (RHSA-2012:0743)	Nessus	Red Hat Local Security Checks	2012/6/19	2024/4/27	high
64044	RHEL 6 : kernel (RHSA-2012:1042)	Nessus	Red Hat Local Security Checks	2013/1/24	2025/4/15	high

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