kernel is vulnerable to privilege escalation. The vulnerability exists through a signedness issue found in the Linux kernel’s CIFS (Common Internet File System) implementation. A malicious CIFS server could send a specially-crafted response to a directory read request that would result in a denial of service or privilege escalation on a system that has a CIFS share mounted.
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=9438fabb73eb48055b58b89fc51e0bc4db22fabd
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=9438fabb73eb48055b58b89fc51e0bc4db22fabd
www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1
www.openwall.com/lists/oss-security/2011/08/24/2
access.redhat.com/errata/RHSA-2011:1465
access.redhat.com/security/updates/classification/#important
bugzilla.redhat.com/show_bug.cgi?id=732869
docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/6.1_Technical_Notes/kernel.html#RHSA-2011-1465
github.com/torvalds/linux/commit/9438fabb73eb48055b58b89fc51e0bc4db22fabd