USN-3099-1: Linux kernel vulnerabilities

Releases

• Ubuntu 16.04 ESM

Packages

• linux - Linux kernel

Details

Vladimír Beneš discovered an unbounded recursion in the VLAN and TEB
Generic Receive Offload (GRO) processing implementations in the Linux
kernel, A remote attacker could use this to cause a stack corruption,
leading to a denial of service (system crash). (CVE-2016-7039)

Marco Grassi discovered a use-after-free condition could occur in the TCP
retransmit queue handling code in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2016-6828)

Pengfei Wang discovered a race condition in the s390 SCLP console driver
for the Linux kernel when handling ioctl()s. A local attacker could use
this to obtain sensitive information from kernel memory. (CVE-2016-6130)

Pengfei Wang discovered a race condition in the Adaptec AAC RAID controller
driver in the Linux kernel when handling ioctl()s. A local attacker could
use this to cause a denial of service (system crash). (CVE-2016-6480)

Update instructions

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

Ubuntu 16.04

• linux-image-4.4.0-42-generic - 4.4.0-42.62
• linux-image-4.4.0-42-generic-lpae - 4.4.0-42.62
• linux-image-4.4.0-42-lowlatency - 4.4.0-42.62
• linux-image-4.4.0-42-powerpc-e500mc - 4.4.0-42.62
• linux-image-4.4.0-42-powerpc-smp - 4.4.0-42.62
• linux-image-4.4.0-42-powerpc64-emb - 4.4.0-42.62
• linux-image-4.4.0-42-powerpc64-smp - 4.4.0-42.62

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-2016-6130
• CVE-2016-6480
• CVE-2016-6828
• CVE-2016-7039

Related notices

• USN-3099-3: linux-image-4.4.0-1027-raspi2, linux-raspi2
• USN-3099-4: linux-snapdragon, linux-image-4.4.0-1030-snapdragon
• USN-3097-2: linux-image-3.2.0-1489-omap4, linux-ti-omap4
• USN-3099-2: linux-image-4.4.0-42-powerpc-smp, linux-lts-xenial, linux-image-4.4.0-42-powerpc64-smp, linux-image-4.4.0-42-powerpc-e500mc, linux-image-4.4.0-42-lowlatency, linux-image-4.4.0-42-powerpc64-emb, linux-image-4.4.0-42-generic-lpae, linux-image-extra-4.4.0-42-generic, linux-image-4.4.0-42-generic
• USN-3097-1: linux-image-3.2.0-111-generic-pae, linux-image-3.2.0-111-highbank, linux-image-3.2.0-111-generic, linux-image-3.2.0-111-powerpc64-smp, linux-image-3.2.0-111-virtual, linux, linux-image-3.2.0-111-omap, linux-image-3.2.0-111-powerpc-smp
• USN-3098-2: linux-lts-trusty, linux-image-3.13.0-98-generic, linux-image-3.13.0-98-generic-lpae
• USN-3098-1: linux-image-3.13.0-98-generic, linux-image-3.13.0-98-powerpc-e500, linux-image-3.13.0-98-powerpc-e500mc, linux-image-3.13.0-98-powerpc-smp, linux-image-3.13.0-98-lowlatency, linux-image-3.13.0-98-powerpc64-smp, linux, linux-image-3.13.0-98-powerpc64-emb, linux-image-extra-3.13.0-98-generic, linux-image-3.13.0-98-generic-lpae