From $URL : Common Vulnerabilities and Exposures assigned an identifier CVE-2012-5375 to the following vulnerability: The CRC32C feature in the Btrfs implementation in the Linux kernel before 3.8-rc1 allows local users to cause a denial of service (prevention of file creation) by leveraging the ability to write to a directory important to the victim, and creating a file with a crafted name that is associated with a specific CRC32C hash value. References: [1] http://openwall.com/lists/oss-security/2012/12/13/20 [2] http://crypto.junod.info/2012/12/13/hash-dos-and-btrfs/ [3] http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=9c52057c698fb96f8f07e7a4bcf4801a092bda89 [4] http://www.kernel.org/pub/linux/kernel/v3.x/testing/patch-3.8-rc1.bz2 [5] https://github.com/torvalds/linux/commit/9c52057c698fb96f8f07e7a4bcf4801a092bda89
There are no longer any 2.x or <3.8-rc1 kernels available in the repository with the exception of sys-kernel/xbox-sources which is unsupported by security.