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redhatRedHatRHSA-2014:1281
HistorySep 22, 2014 - 12:00 a.m.

(RHSA-2014:1281) Moderate: kernel security and bug fix update

2014-09-2200:00:00
access.redhat.com
46

3.3 Low

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:L/AC:M/Au:N/C:P/I:N/A:P

0.0004 Low

EPSS

Percentile

5.7%

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

  • An out-of-bounds memory access flaw was found in the Linux kernel’s
    system call auditing implementation. On a system with existing audit rules
    defined, a local, unprivileged user could use this flaw to leak kernel
    memory to user space or, potentially, crash the system. (CVE-2014-3917,
    Moderate)

This update also fixes the following bugs:

  • A bug in the mtip32xx driver could prevent the Micron P420m PCIe SSD
    devices with unaligned I/O access from completing the submitted I/O
    requests. This resulted in a livelock situation and rendered the Micron
    P420m PCIe SSD devices unusable. To fix this problem, mtip32xx now checks
    whether an I/O access is unaligned and if so, it uses the correct
    semaphore. (BZ#1125776)

  • A series of patches has been backported to improve the functionality of
    a touch pad on the latest Lenovo laptops in Red Hat Enterprise Linux 7.
    (BZ#1122559)

  • Due to a bug in the bnx2x driver, a network adapter could be unable to
    recover from EEH error injection. The network adapter had to be taken
    offline and rebooted in order to function properly again. With this update,
    the bnx2x driver has been corrected and network adapters now recover from
    EEH errors as expected. (BZ#1107722)

  • Previously, if an hrtimer interrupt was delayed, all future pending
    hrtimer events that were queued on the same processor were also delayed
    until the initial hrtimer event was handled. This could cause all hrtimer
    processing to stop for a significant period of time. To prevent this
    problem, the kernel has been modified to handle all expired hrtimer events
    when handling the initially delayed hrtimer event. (BZ#1113175)

  • A previous change to the nouveau driver introduced a bit shift error,
    which resulted in a wrong display resolution being set with some models
    of NVIDIA controllers. With this update, the erroneous code has been
    corrected, and the affected NVIDIA controllers can now set the correct
    display resolution. (BZ#1114869)

  • Due to a NULL pointer dereference bug in the be2net driver, the system
    could experience a kernel oops and reboot when disabling a network adapter
    after a permanent failure. This problem has been fixed by introducing a
    flag to keep track of the setup state. The failing adapter can now be
    disabled successfully without a kernel crash. (BZ#1122558)

  • Previously, the Huge Translation Lookaside Buffer (HugeTLB) allowed
    access to huge pages access by default. However, huge pages may be
    unsupported in some environments, such as a KVM guest on a PowerPC
    architecture, and an attempt to access a huge page in memory would result
    in a kernel oops. This update ensures that HugeTLB denies access to huge
    pages if the huge pages are not supported on the system. (BZ#1122115)

  • If an NVMe device becomes ready but fails to create I/O queues, the nvme
    driver creates a character device handle to manage such a device.
    Previously, a character device could be created before a device reference
    counter was initialized, which resulted in a kernel oops. This problem has
    been fixed by calling the relevant initialization function earlier in the
    code. (BZ#1119720)

  • On some firmware versions of the BladeEngine 3 (BE3) controller,
    interrupts remain disabled after a hardware reset. This was a problem for
    all Emulex-based network adapters using such a BE3 controller because
    these adapters would fail to recover from an EEH error if it occurred. To
    resolve this problem, the be2net driver has been modified to enable the
    interrupts in the eeh_resume handler explicitly. (BZ#1121712)

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.

3.3 Low

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:L/AC:M/Au:N/C:P/I:N/A:P

0.0004 Low

EPSS

Percentile

5.7%

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