USN-3147-1: Linux kernel vulnerabilities

30 November 2016

Several security issues were fixed in the kernel.

Releases

Packages

  • linux - Linux kernel

Details

Andreas Gruenbacher and Jan Kara discovered that the filesystem
implementation in the Linux kernel did not clear the setgid bit during a
setxattr call. A local attacker could use this to possibly elevate group
privileges. (CVE-2016-7097)

Marco Grassi discovered that the driver for Areca RAID Controllers in the
Linux kernel did not properly validate control messages. A local attacker
could use this to cause a denial of service (system crash) or possibly gain
privileges. (CVE-2016-7425)

Update instructions

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

Ubuntu 16.10

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-3145-2: linux-image-generic-lpae-lts-trusty, linux-lts-trusty, linux-image-3.13.0-103-generic, linux-image-3.13.0-103-generic-lpae, linux-image-generic-lts-trusty
  • USN-3422-2: linux-image-3.13.0-132-generic-lpae, linux-image-generic-lpae-lts-trusty, linux-lts-trusty, linux-image-3.13.0-132-generic, linux-image-generic-lts-trusty
  • USN-3161-4: linux-snapdragon, linux-image-snapdragon, linux-image-4.4.0-1042-snapdragon
  • USN-3144-2: linux-image-3.2.0-1494-omap4, linux-ti-omap4, linux-image-omap4
  • USN-3146-1: linux-image-4.4.0-51-powerpc64-emb, linux-image-4.4.0-51-powerpc-e500mc, linux-image-lowlatency, linux-image-generic, linux-image-powerpc-e500mc, linux, linux-image-generic-lpae, linux-image-powerpc64-emb, linux-image-4.4.0-51-powerpc-smp, linux-image-powerpc64-smp, linux-image-powerpc-smp, linux-image-4.4.0-51-generic-lpae, linux-image-4.4.0-51-powerpc64-smp, linux-image-4.4.0-51-generic, linux-image-4.4.0-51-lowlatency
  • USN-3144-1: linux-image-3.2.0-116-powerpc64-smp, linux-image-virtual, linux-image-generic, linux, linux-image-3.2.0-116-powerpc-smp, linux-image-generic-pae, linux-image-powerpc64-smp, linux-image-highbank, linux-image-3.2.0-116-omap, linux-image-3.2.0-116-virtual, linux-image-omap, linux-image-powerpc-smp, linux-image-3.2.0-116-generic, linux-image-3.2.0-116-highbank, linux-image-3.2.0-116-generic-pae
  • USN-3161-3: linux-image-4.4.0-1038-raspi2, linux-raspi2, linux-image-raspi2
  • USN-3422-1: linux-image-3.13.0-132-powerpc64-emb, linux-image-3.13.0-132-powerpc64-smp, linux-image-3.13.0-132-powerpc-e500, linux-image-generic, linux-image-lowlatency, linux, linux-image-generic-lpae, linux-image-powerpc-e500mc, linux-image-powerpc64-emb, linux-image-3.13.0-132-generic-lpae, linux-image-powerpc64-smp, linux-image-3.13.0-132-powerpc-e500mc, linux-image-3.13.0-132-powerpc-smp, linux-image-powerpc-smp, linux-image-3.13.0-132-lowlatency, linux-image-3.13.0-132-generic, linux-image-powerpc-e500
  • USN-3145-1: linux-image-lowlatency, linux-image-powerpc64-emb, linux-image-generic, linux-image-powerpc-e500mc, linux, linux-image-generic-lpae, linux-image-powerpc64-smp, linux-image-3.13.0-103-powerpc-smp, linux-image-3.13.0-103-lowlatency, linux-image-3.13.0-103-powerpc64-smp, linux-image-omap, linux-image-3.13.0-103-powerpc-e500mc, linux-image-3.13.0-103-powerpc64-emb, linux-image-powerpc-smp, linux-image-3.13.0-103-generic, linux-image-3.13.0-103-generic-lpae, linux-image-3.13.0-103-powerpc-e500
  • USN-3146-2: linux-image-powerpc64-smp-lts-xenial, linux-image-4.4.0-51-powerpc64-emb, linux-image-4.4.0-51-powerpc-e500mc, linux-image-lowlatency-lts-xenial, linux-image-generic-lts-xenial, linux-image-4.4.0-51-powerpc-smp, linux-image-virtual-lts-xenial, linux-lts-xenial, linux-image-powerpc-smp-lts-xenial, linux-image-powerpc-e500mc-lts-xenial, linux-image-generic-lpae-lts-xenial, linux-image-4.4.0-51-generic-lpae, linux-image-4.4.0-51-powerpc64-smp, linux-image-4.4.0-51-generic, linux-image-powerpc64-emb-lts-xenial, linux-image-4.4.0-51-lowlatency
  • USN-3162-2: linux-image-4.8.0-1021-raspi2, linux-raspi2, linux-image-raspi2