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USN-1286-1: Linux kernel vulnerabilities

3 December 2011

Several security issues were fixed in the kernel.

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Releases

Packages

Details

Vasily Averin discovered that the NFS Lock Manager (NLM) incorrectly
handled unlock requests. A local attacker could exploit this to cause a
denial of service. (CVE-2011-2491)

Robert Swiecki discovered that mapping extensions were incorrectly handled.
A local attacker could exploit this to crash the system, leading to a
denial of service. (CVE-2011-2496)

It was discovered that the wireless stack incorrectly verified SSID
lengths. A local attacker could exploit this to cause a denial of service
or gain root privileges. (CVE-2011-2517)

Ben Pfaff discovered that Classless Queuing Disciplines (qdiscs) were being
incorrectly handled. A local attacker could exploit this to crash the
system, leading to a denial of service. (CVE-2011-2525)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

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

Ubuntu 10.04

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

Related notices

  • USN-1269-1: linux-image-2.6.32-340-ec2, linux-ec2
  • USN-1272-1: linux-image-2.6.35-31-versatile, linux-image-2.6.35-31-powerpc64-smp, linux-image-2.6.35-31-server, linux-image-2.6.35-31-generic-pae, linux-image-2.6.35-31-generic, linux-image-2.6.35-31-powerpc, linux-image-2.6.35-31-virtual, linux-image-2.6.35-31-omap, linux, linux-image-2.6.35-31-powerpc-smp
  • USN-1268-1: linux-image-2.6.24-30-openvz, linux-image-2.6.24-30-sparc64, linux-image-2.6.24-30-rt, linux-image-2.6.24-30-mckinley, linux-image-2.6.24-30-server, linux-image-2.6.24-30-hppa32, linux-image-2.6.24-30-xen, linux, linux-image-2.6.24-30-generic, linux-image-2.6.24-30-sparc64-smp, linux-image-2.6.24-30-hppa64, linux-image-2.6.24-30-powerpc64-smp, linux-image-2.6.24-30-powerpc, linux-image-2.6.24-30-lpiacompat, linux-image-2.6.24-30-itanium, linux-image-2.6.24-30-386, linux-image-2.6.24-30-virtual, linux-image-2.6.24-30-powerpc-smp, linux-image-2.6.24-30-lpia
  • USN-1281-1: linux-ti-omap4, linux-image-2.6.38-1209-omap4
  • USN-1285-1: linux-image-2.6.38-13-omap, linux-image-2.6.38-13-server, linux-image-2.6.38-13-generic-pae, linux-image-2.6.38-13-virtual, linux-image-2.6.38-13-versatile, linux-image-2.6.38-13-generic, linux-image-2.6.38-13-powerpc64-smp, linux-image-2.6.38-13-powerpc, linux-image-2.6.38-13-powerpc-smp, linux
  • USN-1274-1: linux-image-2.6.32-420-dove, linux-mvl-dove
  • USN-1279-1: linux-image-2.6.38-13-server, linux-image-2.6.38-13-generic-pae, linux-image-2.6.38-13-virtual, linux-image-2.6.38-13-generic, linux-lts-backport-natty
  • USN-1278-1: linux-image-2.6.35-31-server, linux-lts-backport-maverick, linux-image-2.6.35-31-generic-pae, linux-image-2.6.35-31-generic, linux-image-2.6.35-31-virtual
  • USN-1244-1: linux-ti-omap4, linux-image-2.6.35-903-omap4
  • USN-1271-1: linux-fsl-imx51, linux-image-2.6.31-612-imx51
  • USN-1241-1: linux-fsl-imx51, linux-image-2.6.31-611-imx51
  • USN-1280-1: linux-ti-omap4, linux-image-2.6.35-903-omap4
  • USN-1167-1: linux-image-2.6.38-10-generic-pae, linux-image-2.6.38-10-powerpc-smp, linux-image-2.6.38-10-versatile, linux-image-2.6.38-10-generic, linux-image-2.6.38-10-omap, linux-image-2.6.38-10-powerpc, linux-image-2.6.38-10-powerpc64-smp, linux-image-2.6.38-10-server, linux, linux-image-2.6.38-10-virtual
  • USN-1256-1: linux-image-2.6.38-12-generic-pae, linux-lts-backport-natty, linux-image-2.6.38-12-server, linux-image-2.6.38-12-virtual, linux-image-2.6.38-12-generic

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