7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
6.8 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
0.001 Low
EPSS
Percentile
38.9%
CentOS Errata and Security Advisory CESA-2016:0494
The kernel packages contain the Linux kernel, the core of any Linux
operating system.
The security impact of this issue was discovered by Red Hat.
This update also fixes the following bugs:
In the anon_vma structure, the degree counts number of child anon_vmas
and of VMAs which points to this anon_vma. Failure to decrement the
parentβs degree in the unlink_anon_vma() function, when its list was empty,
previously triggered a BUG_ON() assertion. The provided patch makes sure
the anon_vma degree is always decremented when the VMA list is empty, thus
fixing this bug. (BZ#1318364)
When running Internet Protocol Security (IPSEC) on external storage
encrypted with LUKS under a substantial load on the system, data
corruptions could previously occur. A set of upstream patches has been
provided, and data corruption is no longer reported in this situation.
(BZ#1298994)
Due to prematurely decremented calc_load_task, the calculated load
average was off by up to the number of CPUs in the machine. As a
consequence, job scheduling worked improperly causing a drop in the system
performance. This update keeps the delta of the CPU going into NO_HZ idle
separately, and folds the pending idle delta into the global active count
while correctly aging the averages for the idle-duration when leaving NO_HZ
mode. Now, job scheduling works correctly, ensuring balanced CPU load.
(BZ#1300349)
Due to a regression in the Red Hat Enterprise Linux 6.7 kernel, the
cgroup OOM notifier accessed a cgroup-specific internal data structure
without a proper locking protection, which led to a kernel panic. This
update adjusts the cgroup OOM notifier to lock internal data properly,
thus fixing the bug. (BZ#1302763)
GFS2 had a rare timing window that sometimes caused it to reference an
uninitialized variable. Consequently, a kernel panic occurred. The code has
been changed to reference the correct value during this timing window, and
the kernel no longer panics. (BZ#1304332)
Due to a race condition whereby a cache operation could be submitted
after a cache object was killed, the kernel occasionally crashed on systems
running the cachefilesd service. The provided patch prevents the race
condition by adding serialization in the code that makes the object
unavailable. As a result, all subsequent operations targetted on the object
are rejected and the kernel no longer crashes in this scenario.
(BZ#1308471)
This update also adds this enhancement:
All kernel users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues and add this
enhancement. The system must be rebooted for this update to take effect.
Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2016-March/083931.html
Affected packages:
kernel
kernel-abi-whitelists
kernel-debug
kernel-debug-devel
kernel-devel
kernel-doc
kernel-firmware
kernel-headers
perf
python-perf
Upstream details at:
https://access.redhat.com/errata/RHSA-2016:0494
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
CentOS | 6 | i686 | kernel | <Β 2.6.32-573.22.1.el6 | kernel-2.6.32-573.22.1.el6.i686.rpm |
CentOS | 6 | noarch | kernel-abi-whitelists | <Β 2.6.32-573.22.1.el6 | kernel-abi-whitelists-2.6.32-573.22.1.el6.noarch.rpm |
CentOS | 6 | i686 | kernel-debug | <Β 2.6.32-573.22.1.el6 | kernel-debug-2.6.32-573.22.1.el6.i686.rpm |
CentOS | 6 | i686 | kernel-debug-devel | <Β 2.6.32-573.22.1.el6 | kernel-debug-devel-2.6.32-573.22.1.el6.i686.rpm |
CentOS | 6 | i686 | kernel-devel | <Β 2.6.32-573.22.1.el6 | kernel-devel-2.6.32-573.22.1.el6.i686.rpm |
CentOS | 6 | noarch | kernel-doc | <Β 2.6.32-573.22.1.el6 | kernel-doc-2.6.32-573.22.1.el6.noarch.rpm |
CentOS | 6 | noarch | kernel-firmware | <Β 2.6.32-573.22.1.el6 | kernel-firmware-2.6.32-573.22.1.el6.noarch.rpm |
CentOS | 6 | i686 | kernel-headers | <Β 2.6.32-573.22.1.el6 | kernel-headers-2.6.32-573.22.1.el6.i686.rpm |
CentOS | 6 | i686 | perf | <Β 2.6.32-573.22.1.el6 | perf-2.6.32-573.22.1.el6.i686.rpm |
CentOS | 6 | i686 | python-perf | <Β 2.6.32-573.22.1.el6 | python-perf-2.6.32-573.22.1.el6.i686.rpm |
7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
6.8 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
0.001 Low
EPSS
Percentile
38.9%