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USN-1405-1: Linux kernel vulnerabilities

27 March 2012

Several security issues were fixed in the kernel.

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.

Learn more about Ubuntu Pro

Releases

Packages

Details

Paolo Bonzini discovered a flaw in Linux's handling of the SG_IO ioctl
command. A local user, or user in a VM could exploit this flaw to bypass
restrictions and gain read/write access to all data on the affected block
device. (CVE-2011-4127)

A flaw was found in the Linux kernel's ext4 file system when mounting a
corrupt filesystem. A user-assisted remote attacker could exploit this flaw
to cause a denial of service. (CVE-2012-2100)

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.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 11.10

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

Related notices

  • USN-1388-1: linux-image-2.6.32-343-ec2, linux-ec2
  • USN-1384-1: linux-lts-backport-oneiric, linux-image-3.0.0-16-generic-pae, linux-image-3.0.0-16-virtual, linux-image-3.0.0-16-server, linux-image-3.0.0-16-generic
  • USN-1389-1: linux-image-2.6.32-39-generic-pae, linux-image-2.6.32-39-server, linux-image-2.6.32-39-ia64, linux-image-2.6.32-39-powerpc64-smp, linux-image-2.6.32-39-generic, linux-image-2.6.32-39-sparc64, linux, linux-image-2.6.32-39-sparc64-smp, linux-image-2.6.32-39-preempt, linux-image-2.6.32-39-versatile, linux-image-2.6.32-39-lpia, linux-image-2.6.32-39-virtual, linux-image-2.6.32-39-powerpc-smp, linux-image-2.6.32-39-powerpc, linux-image-2.6.32-39-386
  • USN-1440-1: linux-image-2.6.38-15-generic-pae, linux-image-2.6.38-15-generic, linux-lts-backport-natty, linux-image-2.6.38-15-server, linux-image-2.6.38-15-virtual
  • USN-1432-1: linux-image-2.6.38-15-powerpc64-smp, linux-image-2.6.38-15-generic-pae, linux-image-2.6.38-15-omap, linux, linux-image-2.6.38-15-generic, linux-image-2.6.38-15-powerpc, linux-image-2.6.38-15-versatile, linux-image-2.6.38-15-server, linux-image-2.6.38-15-powerpc-smp, linux-image-2.6.38-15-virtual
  • USN-1404-1: linux-ti-omap4, linux-image-3.0.0-1208-omap4
  • USN-1458-1: linux-image-2.6.38-1209-omap4, linux-ti-omap4