USN-3097-1: Linux kernel vulnerabilities

11 October 2016

Several security issues were fixed in the kernel.



  • linux - Linux kernel


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 audit subsystem in the
Linux kernel. A local attacker could use this to corrupt audit logs or
disrupt system-call auditing. (CVE-2016-6136)

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 12.04

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.

Related notices

  • USN-3097-2: linux-ti-omap4, linux-image-3.2.0-1489-omap4
  • USN-3084-1: linux-image-4.4.0-38-generic, linux-image-4.4.0-38-powerpc-e500mc, linux-image-4.4.0-38-generic-lpae, linux-image-4.4.0-38-powerpc64-emb, linux, linux-image-4.4.0-38-powerpc-smp, linux-image-4.4.0-38-powerpc64-smp, linux-image-4.4.0-38-lowlatency
  • USN-3098-1: linux-image-3.13.0-98-generic-lpae, linux-image-3.13.0-98-powerpc64-smp, linux-image-3.13.0-98-powerpc-smp, linux-image-3.13.0-98-powerpc64-emb, linux, linux-image-3.13.0-98-generic, linux-image-3.13.0-98-powerpc-e500mc, linux-image-3.13.0-98-powerpc-e500, linux-image-3.13.0-98-lowlatency
  • USN-3084-2: linux-image-4.4.0-38-generic, linux-image-4.4.0-38-powerpc-e500mc, linux-image-4.4.0-38-generic-lpae, linux-lts-xenial, linux-image-4.4.0-38-powerpc64-emb, linux-image-4.4.0-38-powerpc64-smp, linux-image-4.4.0-38-powerpc-smp, linux-image-4.4.0-38-lowlatency
  • USN-3098-2: linux-image-3.13.0-98-generic, linux-image-3.13.0-98-generic-lpae, linux-lts-trusty
  • USN-3099-2: linux-lts-xenial, linux-image-4.4.0-42-lowlatency, linux-image-4.4.0-42-powerpc-smp, linux-image-4.4.0-42-powerpc64-emb, linux-image-4.4.0-42-generic, linux-image-4.4.0-42-powerpc-e500mc, linux-image-4.4.0-42-generic-lpae, linux-image-4.4.0-42-powerpc64-smp
  • USN-3099-1: linux-image-4.4.0-42-lowlatency, linux-image-4.4.0-42-powerpc-smp, linux-image-4.4.0-42-powerpc64-emb, linux, linux-image-4.4.0-42-generic, linux-image-4.4.0-42-powerpc-e500mc, linux-image-4.4.0-42-generic-lpae, linux-image-4.4.0-42-powerpc64-smp
  • USN-3099-3: linux-raspi2, linux-image-4.4.0-1027-raspi2
  • USN-3084-3: linux-image-4.4.0-1023-raspi2, linux-raspi2
  • USN-3099-4: linux-snapdragon, linux-image-4.4.0-1030-snapdragon
  • USN-3084-4: linux-snapdragon, linux-image-4.4.0-1026-snapdragon