CentOS Errata and Security Advisory CESA-2015:1978
The kernel packages contain the Linux kernel, the core of any Linux operating system.
A flaw was found in the way the Linux kernel's VFS subsystem handled file system locks. A local, unprivileged user could use this flaw to trigger a deadlock in the kernel, causing a denial of service on the system. (CVE-2014-8559, Moderate)
A buffer overflow flaw was found in the way the Linux kernel's virtio-net subsystem handled certain fraglists when the GRO (Generic Receive Offload) functionality was enabled in a bridged network configuration. An attacker on the local network could potentially use this flaw to crash the system, or, although unlikely, elevate their privileges on the system. (CVE-2015-5156, Moderate)
The CVE-2015-5156 issue was discovered by Jason Wang of Red Hat.
This update also fixes several bugs and adds one enhancement. Refer to the following Knowledgebase article for further information:
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: http://lists.centos.org/pipermail/centos-announce/2015-November/033501.html
Affected packages: kernel kernel-abi-whitelists kernel-debug kernel-debug-devel kernel-devel kernel-doc kernel-headers kernel-tools kernel-tools-libs kernel-tools-libs-devel perf python-perf
Upstream details at: https://rhn.redhat.com/errata/RHSA-2015-1978.html