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USN-1487-1: Linux kernel vulnerability

29 June 2012

The system could be made to crash if it received specially crafted network traffic.




A flaw was discovered in the Linux kernel's NFSv4 (Network file system)
handling of ACLs (access control lists). A remote NFS server (attacker)
could cause a denial of service (OOPS).

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.

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-1486-1: linux-image-3.2.0-26-generic-pae, linux-image-3.2.0-26-omap, linux-image-3.2.0-26-generic, linux-image-3.2.0-26-powerpc64-smp, linux-image-3.2.0-26-powerpc-smp, linux-image-3.2.0-26-highbank, linux, linux-image-3.2.0-26-virtual
  • USN-1499-1: linux-image-3.0.0-1212-omap4, linux-ti-omap4
  • USN-1489-1: linux-image-3.0.0-22-virtual, linux-image-3.0.0-22-generic-pae, linux-image-3.0.0-22-generic, linux-lts-backport-oneiric, linux-image-3.0.0-22-server
  • USN-1490-1: linux-image-2.6.38-15-generic, linux-image-2.6.38-15-generic-pae, linux-lts-backport-natty, linux-image-2.6.38-15-virtual, linux-image-2.6.38-15-server
  • USN-1494-1: linux-ti-omap4, linux-image-3.2.0-1415-omap4
  • USN-1488-1: linux-image-2.6.38-15-generic, linux-image-2.6.38-15-powerpc64-smp, linux-image-2.6.38-15-server, linux-image-2.6.38-15-powerpc, linux-image-2.6.38-15-versatile, linux-image-2.6.38-15-virtual, linux-image-2.6.38-15-powerpc-smp, linux-image-2.6.38-15-generic-pae, linux, linux-image-2.6.38-15-omap
  • USN-1530-1: linux-image-2.6.38-1209-omap4, linux-ti-omap4