[USN-2823-1] Linux kernel vulnerabilities

Steve Beattie steve.beattie at canonical.com
Tue Dec 1 21:17:10 UTC 2015

Ubuntu Security Notice USN-2823-1
December 01, 2015

linux 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: Linux kernel


It was discovered that the SCTP protocol implementation in the Linux kernel
performed an incorrect sequence of protocol-initialization steps. A local
attacker could use this to cause a denial of service (system crash).

Dmitry Vyukov discovered that the Linux kernel's keyring handler attempted
to garbage collect incompletely instantiated keys. A local unprivileged
attacker could use this to cause a denial of service (system crash).

Update instructions:

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

Ubuntu 14.04 LTS:
  linux-image-3.13.0-71-generic   3.13.0-71.114
  linux-image-3.13.0-71-generic-lpae  3.13.0-71.114
  linux-image-3.13.0-71-lowlatency  3.13.0-71.114
  linux-image-3.13.0-71-powerpc-e500  3.13.0-71.114
  linux-image-3.13.0-71-powerpc-e500mc  3.13.0-71.114
  linux-image-3.13.0-71-powerpc-smp  3.13.0-71.114
  linux-image-3.13.0-71-powerpc64-emb  3.13.0-71.114
  linux-image-3.13.0-71-powerpc64-smp  3.13.0-71.114

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-2015-5283, CVE-2015-7872

Package Information:

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