[USN-2751-1] Linux kernel (Vivid HWE) vulnerabilities

Steve Beattie steve.beattie at canonical.com
Tue Sep 29 09:38:36 UTC 2015

Ubuntu Security Notice USN-2751-1
September 29, 2015

linux-lts-vivid vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 LTS


Several security issues were fixed in the kernel.

Software Description:
- linux-lts-vivid: Linux hardware enablement kernel from Vivid


Benjamin Randazzo discovered an information leak in the md (multiple
device) driver when the bitmap_info.file is disabled. A local privileged
attacker could use this to obtain sensitive information from the kernel.

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).

Update instructions:

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

Ubuntu 14.04 LTS:
  linux-image-3.19.0-30-generic   3.19.0-30.33~14.04.1
  linux-image-3.19.0-30-generic-lpae  3.19.0-30.33~14.04.1
  linux-image-3.19.0-30-lowlatency  3.19.0-30.33~14.04.1
  linux-image-3.19.0-30-powerpc-e500mc  3.19.0-30.33~14.04.1
  linux-image-3.19.0-30-powerpc-smp  3.19.0-30.33~14.04.1
  linux-image-3.19.0-30-powerpc64-emb  3.19.0-30.33~14.04.1
  linux-image-3.19.0-30-powerpc64-smp  3.19.0-30.33~14.04.1

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.

  CVE-2015-5697, CVE-2015-6252

Package Information:

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