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USN-2760-1: Linux kernel (OMAP4) vulnerabilities

01 October 2015

Several security issues were fixed in the kernel.

Releases

Packages

Details

It was discovered that an integer overflow error existed in the SCSI
generic (sg) driver in the Linux kernel. A local attacker with write
permission to a SCSI generic device could use this to cause a denial of
service (system crash) or potentially escalate their privileges.
(CVE-2015-5707)

Marc-André Lureau discovered that the vhost driver did not properly
release the userspace provided log file descriptor. A privileged attacker
could use this to cause a denial of service (resource exhaustion).
(CVE-2015-6252)

It was discovered that the Linux kernel's perf subsystem did not bound
callchain backtraces on PowerPC 64. A local attacker could use this to
cause a denial of service. (CVE-2015-6526)

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. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

Related notices

  • USN-2752-1: linux-image-3.19.0-30-powerpc-smp, linux-image-3.19.0-30-lowlatency, linux-image-3.19.0-30-generic-lpae, linux-image-3.19.0-30-generic, linux, linux-image-3.19.0-30-powerpc64-smp, linux-image-3.19.0-30-powerpc64-emb, linux-image-3.19.0-30-powerpc-e500mc
  • USN-2737-1: linux-image-3.19.0-28-lowlatency, linux-image-3.19.0-28-generic-lpae, linux-image-3.19.0-28-powerpc64-smp, linux-image-3.19.0-28-generic, linux-image-3.19.0-28-powerpc64-emb, linux-image-extra-3.19.0-28-generic, linux-lts-vivid, linux-image-3.19.0-28-powerpc-e500mc, linux-image-3.19.0-28-powerpc-smp
  • USN-2759-1: linux-image-3.2.0-91-omap, linux-image-3.2.0-91-generic, linux, linux-image-3.2.0-91-highbank, linux-image-3.2.0-91-powerpc-smp, linux-image-3.2.0-91-virtual, linux-image-3.2.0-91-generic-pae, linux-image-3.2.0-91-powerpc64-smp
  • USN-2748-1: linux-image-3.13.0-65-powerpc64-emb, linux, linux-image-3.13.0-65-powerpc-e500mc, linux-image-3.13.0-65-generic-lpae, linux-image-3.13.0-65-powerpc64-smp, linux-image-3.13.0-65-powerpc-e500, linux-image-3.13.0-65-lowlatency, linux-image-3.13.0-65-powerpc-smp, linux-image-3.13.0-65-generic, linux-image-extra-3.13.0-65-generic
  • USN-2749-1: linux-image-3.13.0-65-generic, linux-image-3.13.0-65-generic-lpae, linux-lts-trusty
  • USN-2733-1: linux-image-3.13.0-63-generic, linux-lts-trusty, linux-image-3.13.0-63-generic-lpae
  • USN-2734-1: linux-image-3.13.0-63-generic, linux-image-3.13.0-63-generic-lpae, linux-image-3.13.0-63-powerpc64-smp, linux, linux-image-3.13.0-63-lowlatency, linux-image-3.13.0-63-powerpc-e500mc, linux-image-3.13.0-63-powerpc-smp, linux-image-3.13.0-63-powerpc64-emb, linux-image-extra-3.13.0-63-generic, linux-image-3.13.0-63-powerpc-e500
  • USN-2738-1: linux-image-3.19.0-28-lowlatency, linux-image-3.19.0-28-generic-lpae, linux-image-3.19.0-28-powerpc64-smp, linux-image-3.19.0-28-generic, linux-image-3.19.0-28-powerpc64-emb, linux, linux-image-3.19.0-28-powerpc-e500mc, linux-image-3.19.0-28-powerpc-smp
  • USN-2777-1: linux-image-3.16.0-51-powerpc-smp, linux-image-3.16.0-51-powerpc64-emb, linux-image-3.16.0-51-powerpc64-smp, linux-lts-utopic, linux-image-3.16.0-51-lowlatency, linux-image-3.16.0-51-generic-lpae, linux-image-extra-3.16.0-51-generic, linux-image-3.16.0-51-powerpc-e500mc, linux-image-3.16.0-51-generic
  • USN-2751-1: linux-image-3.19.0-30-powerpc-smp, linux-image-3.19.0-30-lowlatency, linux-image-3.19.0-30-generic-lpae, linux-image-3.19.0-30-generic, linux-image-extra-3.19.0-30-generic, linux-image-3.19.0-30-powerpc64-smp, linux-lts-vivid, linux-image-3.19.0-30-powerpc64-emb, linux-image-3.19.0-30-powerpc-e500mc
  • USN-2750-1: linux-image-3.16.0-50-powerpc-e500mc, linux-image-extra-3.16.0-50-generic, linux-image-3.16.0-50-generic, linux-lts-utopic, linux-image-3.16.0-50-powerpc64-smp, linux-image-3.16.0-50-powerpc64-emb, linux-image-3.16.0-50-lowlatency, linux-image-3.16.0-50-generic-lpae, linux-image-3.16.0-50-powerpc-smp