Important CentOS kernel Security Update


kernel-2.6.32-504.23.4.el6.i686.rpm, kernel-2.6.32-504.23.4.el6.src.rpm, kernel-2.6.32-504.23.4.el6.x86_64.rpm, kernel-abi-whitelists-2.6.32-504.23.4.el6.noarch.rpm, kernel-debug-2.6.32-504.23.4.el6.i686.rpm, kernel-debug-2.6.32-504.23.4.el6.x86_64.rpm, kernel-debug-devel-2.6.32-504.23.4.el6.i686.rpm, kernel-debug-devel-2.6.32-504.23.4.el6.x86_64.rpm, kernel-devel-2.6.32-504.23.4.el6.i686.rpm, kernel-devel-2.6.32-504.23.4.el6.x86_64.rpm, kernel-doc-2.6.32-504.23.4.el6.noarch.rpm, kernel-firmware-2.6.32-504.23.4.el6.noarch.rpm, kernel-headers-2.6.32-504.23.4.el6.i686.rpm, kernel-headers-2.6.32-504.23.4.el6.x86_64.rpm, perf-2.6.32-504.23.4.el6.i686.rpm, perf-2.6.32-504.23.4.el6.x86_64.rpm, python-perf-2.6.32-504.23.4.el6.i686.rpm, python-perf-2.6.32-504.23.4.el6.x86_64.rpm,
2018-01-18 11:09
2017-07-27 19:09
2017-04-01 19:09
2017-01-05 20:13


Updated kernel packages that fix multiple security issues, several bugs,
and add various enhancements are now available for Red Hat Enterprise
Linux 6.

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 implementation of vectored pipe read
and write functionality did not take into account the I/O vectors that were
already processed when retrying after a failed atomic access operation,
potentially resulting in memory corruption due to an I/O vector array
overrun. A local, unprivileged user could use this flaw to crash the system
or, potentially, escalate their privileges on the system. (CVE-2015-1805,

* A buffer overflow flaw was found in the way the Linux kernel's Intel
AES-NI instructions optimized version of the RFC4106 GCM mode decryption
functionality handled fragmented packets. A remote attacker could use this
flaw to crash, or potentially escalate their privileges on, a system over a
connection with an active AES-GCM mode IPSec security association.
(CVE-2015-3331, Important)

* An information leak flaw was found in the way the Linux kernel changed
certain segment registers and thread-local storage (TLS) during a context
switch. A local, unprivileged user could use this flaw to leak the user
space TLS base address of an arbitrary process. (CVE-2014-9419, Low)

* It was found that the Linux kernel's ISO file system implementation did
not correctly limit the traversal of Rock Ridge extension Continuation
Entries (CE). An attacker with physical access to the system could use this
flaw to trigger an infinite loop in the kernel, resulting in a denial of
service. (CVE-2014-9420, Low)

* An information leak flaw was found in the way the Linux kernel's Virtual
Dynamic Shared Object (vDSO) implementation performed address
randomization. A local, unprivileged user could use this flaw to leak
kernel memory addresses to user-space. (CVE-2014-9585, Low)

Red Hat would like to thank Carl Henrik Lunde for reporting
CVE-2014-9420. The security impact of the CVE-2015-1805 issue was
discovered by Red Hat.

This update also fixes several bugs and adds various enhancements.
Documentation for these changes is available from the Technical Notes
document linked to in the References section.

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

Am I vulnerable?

The constraints below list the versions that this vulnerability is patched in, and versions that are unaffected. If a patch is ready but unrealeased, then it is pending.

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Affected package information

Release Package Patched in
6 kernel kernel-2.6.32-504.23.4.el6.i686.rpm
kernel kernel-2.6.32-504.23.4.el6.src.rpm
kernel kernel-2.6.32-504.23.4.el6.x86_64.rpm
kernel-abi-whitelists kernel-abi-whitelists-2.6.32-504.23.4.el6.noarch.rpm
kernel-debug kernel-debug-2.6.32-504.23.4.el6.i686.rpm
kernel-debug kernel-debug-2.6.32-504.23.4.el6.x86_64.rpm
kernel-debug-devel kernel-debug-devel-2.6.32-504.23.4.el6.i686.rpm
kernel-debug-devel kernel-debug-devel-2.6.32-504.23.4.el6.x86_64.rpm
kernel-devel kernel-devel-2.6.32-504.23.4.el6.i686.rpm
kernel-devel kernel-devel-2.6.32-504.23.4.el6.x86_64.rpm
kernel-doc kernel-doc-2.6.32-504.23.4.el6.noarch.rpm
kernel-firmware kernel-firmware-2.6.32-504.23.4.el6.noarch.rpm
kernel-headers kernel-headers-2.6.32-504.23.4.el6.i686.rpm
kernel-headers kernel-headers-2.6.32-504.23.4.el6.x86_64.rpm
perf perf-2.6.32-504.23.4.el6.i686.rpm
perf perf-2.6.32-504.23.4.el6.x86_64.rpm
python-perf python-perf-2.6.32-504.23.4.el6.i686.rpm
python-perf python-perf-2.6.32-504.23.4.el6.x86_64.rpm