CVE-2011-3638 Information

Description

fs/ext4/extents.c in the Linux kernel before 3.0 does not mark a modified extent as dirty in certain cases of extent splitting which allows local users to cause a denial of service (system crash) via vectors involving ext4 umount and mount operations.

Reference

http://ftp.osuosl.org/pub/linux/kernel/v3.0/ChangeLog-3.0 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=667eff35a1f56fa74ce98a0c7c29a40adc1ba4e3 http://www.openwall.com/lists/oss-security/2011/10/24/2 https://bugzilla.redhat.com/show_bug.cgi?id=747942 https://github.com/torvalds/linux/commit/667eff35a1f56fa74ce98a0c7c29a40adc1ba4e3