USN-2872-2: Linux kernel (Wily HWE) vulnerability

Releases

• Ubuntu 14.04 ESM

Packages

• linux-lts-wily - Linux hardware enablement kernel from Wily

Details

Yevgeny Pats discovered that the session keyring implementation in the
Linux kernel did not properly reference count when joining an existing
session keyring. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code with
administrative privileges.

Update instructions

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

Ubuntu 14.04

• linux-image-4.2.0-25-generic - 4.2.0-25.30~14.04.1
• linux-image-4.2.0-25-generic-lpae - 4.2.0-25.30~14.04.1
• linux-image-4.2.0-25-lowlatency - 4.2.0-25.30~14.04.1
• linux-image-4.2.0-25-powerpc-e500mc - 4.2.0-25.30~14.04.1
• linux-image-4.2.0-25-powerpc-smp - 4.2.0-25.30~14.04.1
• linux-image-4.2.0-25-powerpc64-emb - 4.2.0-25.30~14.04.1
• linux-image-4.2.0-25-powerpc64-smp - 4.2.0-25.30~14.04.1

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.

References

• CVE-2016-0728

Related notices

• USN-2870-1: linux-image-3.13.0-76-lowlatency, linux-image-3.13.0-76-generic, linux-image-extra-3.13.0-76-generic, linux-image-3.13.0-76-powerpc64-emb, linux-image-3.13.0-76-powerpc-e500mc, linux, linux-image-3.13.0-76-powerpc-e500, linux-image-3.13.0-76-powerpc64-smp, linux-image-3.13.0-76-generic-lpae, linux-image-3.13.0-76-powerpc-smp
• USN-2870-2: linux-lts-trusty, linux-image-3.13.0-76-generic, linux-image-3.13.0-76-generic-lpae
• USN-2873-1: linux-image-3.16.0-59-powerpc-e500mc, linux-image-extra-3.16.0-59-generic, linux-image-3.16.0-59-generic-lpae, linux-image-3.16.0-59-lowlatency, linux-image-3.16.0-59-powerpc-smp, linux-lts-utopic, linux-image-3.16.0-59-generic, linux-image-3.16.0-59-powerpc64-emb, linux-image-3.16.0-59-powerpc64-smp
• USN-2871-1: linux-image-3.19.0-47-generic-lpae, linux-image-3.19.0-47-generic, linux-image-3.19.0-47-powerpc64-emb, linux-image-3.19.0-47-lowlatency, linux-image-3.19.0-47-powerpc-smp, linux-image-3.19.0-47-powerpc-e500mc, linux, linux-image-3.19.0-47-powerpc64-smp
• USN-2872-1: linux-image-4.2.0-25-powerpc-e500mc, linux-image-4.2.0-25-lowlatency, linux-image-4.2.0-25-generic, linux-image-4.2.0-25-generic-lpae, linux-image-4.2.0-25-powerpc-smp, linux-image-4.2.0-25-powerpc64-emb, linux, linux-image-4.2.0-25-powerpc64-smp
• USN-2872-3: linux-raspi2, linux-image-4.2.0-1020-raspi2
• USN-2871-2: linux-image-3.19.0-47-generic-lpae, linux-image-extra-3.19.0-47-generic, linux-image-3.19.0-47-generic, linux-image-3.19.0-47-powerpc64-emb, linux-image-3.19.0-47-lowlatency, linux-lts-vivid, linux-image-3.19.0-47-powerpc-smp, linux-image-3.19.0-47-powerpc-e500mc, linux-image-3.19.0-47-powerpc64-smp