USN-3126-1: Linux kernel vulnerabilities

Releases

• Ubuntu 12.04

Packages

• 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 versions:

Ubuntu 12.04

• 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

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-2016-7042
• CVE-2016-7117

Related notices

• USN-3127-1: linux, linux-image-3.13.0-101-lowlatency, linux-image-3.13.0-101-powerpc64-emb, linux-image-3.13.0-101-generic-lpae, linux-image-3.13.0-101-generic, linux-image-3.13.0-101-powerpc-e500mc, linux-image-3.13.0-101-powerpc64-smp, linux-image-extra-3.13.0-101-generic, linux-image-3.13.0-101-powerpc-e500, linux-image-3.13.0-101-powerpc-smp
• USN-3127-2: linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-101-generic-lpae, linux-image-3.13.0-101-generic, linux-image-generic-lts-trusty, linux-lts-trusty
• USN-3126-2: linux-ti-omap4, linux-image-omap4, linux-image-3.2.0-1493-omap4
• USN-3161-3: linux-image-4.4.0-1038-raspi2, linux-raspi2
• USN-3129-1: linux, linux-image-4.8.0-27-powerpc64-emb, linux-image-generic-lpae, linux-image-powerpc-smp, linux-image-powerpc64-emb, linux-image-4.8.0-27-generic, linux-image-powerpc-e500mc, linux-image-4.8.0-27-powerpc-e500mc, linux-image-4.8.0-27-lowlatency, linux-image-4.8.0-27-powerpc-smp, linux-image-powerpc64-smp, linux-image-4.8.0-27-generic-lpae, linux-image-generic, linux-image-virtual, linux-image-lowlatency
• USN-3129-2: linux-raspi2, linux-image-raspi2, linux-image-4.8.0-1018-raspi2
• USN-3128-1: linux, linux-image-4.4.0-47-generic, linux-image-4.4.0-47-lowlatency, linux-image-4.4.0-47-powerpc-e500mc, linux-image-4.4.0-47-generic-lpae, linux-image-extra-4.4.0-47-generic, linux-image-4.4.0-47-powerpc64-smp, linux-image-4.4.0-47-powerpc-smp, linux-image-4.4.0-47-powerpc64-emb
• USN-3128-3: linux-snapdragon, linux-image-4.4.0-1035-snapdragon
• USN-3128-2: linux-image-4.4.0-47-generic, linux-image-4.4.0-47-lowlatency, linux-image-4.4.0-47-powerpc-e500mc, linux-image-4.4.0-47-generic-lpae, linux-image-extra-4.4.0-47-generic, linux-image-4.4.0-47-powerpc64-smp, linux-image-4.4.0-47-powerpc-smp, linux-image-4.4.0-47-powerpc64-emb, linux-lts-xenial