USN-3126-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-3126-1

11th November, 2016

linux vulnerabilities

A security issue affects these releases of Ubuntu and its
derivatives:

Ubuntu 12.04 LTS

Summary

Several security issues were fixed in the kernel.

Software description

linux
– Linux kernel

Details

Ondrej Kozina discovered that the keyring interface in the Linux kernel
contained a buffer overflow when displaying timeout events via the
/proc/keys interface. A local attacker could use this to cause a denial of
service (system crash). (CVE-2016-7042)

Dmitry Vyukov discovered a use-after-free vulnerability during error
processing in the recvmmsg(2) implementation in the Linux kernel. A remote
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2016-7117)

Update instructions

The problem can be corrected by updating your system to the following
package version:

Ubuntu 12.04 LTS:: linux-image-3.2.0-115-generic

3.2.0-115.157; linux-image-3.2.0-115-powerpc-smp

3.2.0-115.157; linux-image-powerpc

3.2.0.115.131; linux-image-3.2.0-115-virtual

3.2.0-115.157; linux-image-3.2.0-115-highbank

3.2.0-115.157; linux-image-3.2.0-115-omap

3.2.0-115.157; linux-image-highbank

3.2.0.115.131; linux-image-powerpc-smp

3.2.0.115.131; linux-image-virtual

3.2.0.115.131; linux-image-3.2.0-115-generic-pae

3.2.0-115.157; linux-image-powerpc64-smp

3.2.0.115.131; linux-image-generic-pae

3.2.0.115.131; linux-image-generic

3.2.0.115.131; linux-image-omap

3.2.0.115.131; linux-image-3.2.0-115-powerpc64-smp

3.2.0-115.157

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.