Important CentOS kernel Security Update


kernel-3.10.0-123.4.4.el7.src.rpm, kernel-3.10.0-123.4.4.el7.x86_64.rpm, kernel-abi-whitelists-3.10.0-123.4.4.el7.noarch.rpm, kernel-debug-3.10.0-123.4.4.el7.x86_64.rpm, kernel-debug-devel-3.10.0-123.4.4.el7.x86_64.rpm, kernel-devel-3.10.0-123.4.4.el7.x86_64.rpm, kernel-doc-3.10.0-123.4.4.el7.noarch.rpm, kernel-headers-3.10.0-123.4.4.el7.x86_64.rpm, kernel-tools-3.10.0-123.4.4.el7.x86_64.rpm, kernel-tools-libs-3.10.0-123.4.4.el7.x86_64.rpm, kernel-tools-libs-devel-3.10.0-123.4.4.el7.x86_64.rpm, perf-3.10.0-123.4.4.el7.x86_64.rpm, python-perf-3.10.0-123.4.4.el7.x86_64.rpm,
2018-01-18 11:07
2017-07-27 19:07
2017-04-01 19:08
2017-01-05 20:12


Updated kernel packages that fix two security issues are now available for
Red Hat Enterprise Linux 7.

The Red Hat Security Response Team 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 ptrace subsystem allowed a traced
process' instruction pointer to be set to a non-canonical memory address
without forcing the non-sysret code path when returning to user space.
A local, unprivileged user could use this flaw to crash the system or,
potentially, escalate their privileges on the system. (CVE-2014-4699,

Note: The CVE-2014-4699 issue only affected systems using an Intel CPU.

* A flaw was found in the way the pppol2tp_setsockopt() and
pppol2tp_getsockopt() functions in the Linux kernel's PPP over L2TP
implementation handled requests with a non-SOL_PPPOL2TP socket option
level. A local, unprivileged user could use this flaw to escalate their
privileges on the system. (CVE-2014-4943, Important)

Red Hat would like to thank Andy Lutomirski for reporting CVE-2014-4699,
and Sasha Levin for reporting CVE-2014-4943.

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.
Please see

Am I vulnerable?

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Affected package information

Release Package Patched in
7 kernel kernel-3.10.0-123.4.4.el7.src.rpm
kernel kernel-3.10.0-123.4.4.el7.x86_64.rpm
kernel-abi-whitelists kernel-abi-whitelists-3.10.0-123.4.4.el7.noarch.rpm
kernel-debug kernel-debug-3.10.0-123.4.4.el7.x86_64.rpm
kernel-debug-devel kernel-debug-devel-3.10.0-123.4.4.el7.x86_64.rpm
kernel-devel kernel-devel-3.10.0-123.4.4.el7.x86_64.rpm
kernel-doc kernel-doc-3.10.0-123.4.4.el7.noarch.rpm
kernel-headers kernel-headers-3.10.0-123.4.4.el7.x86_64.rpm
kernel-tools kernel-tools-3.10.0-123.4.4.el7.x86_64.rpm
kernel-tools-libs kernel-tools-libs-3.10.0-123.4.4.el7.x86_64.rpm
kernel-tools-libs-devel kernel-tools-libs-devel-3.10.0-123.4.4.el7.x86_64.rpm
perf perf-3.10.0-123.4.4.el7.x86_64.rpm
python-perf python-perf-3.10.0-123.4.4.el7.x86_64.rpm