Description
The mem_cgroup_usage_unregister_event function in mm/memcontrol.c in the Linux kernel before 3.2.10 does not properly handle multiple events that are attached to the same eventfd, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact by registering memory threshold events.
References
- SUSE-SU-2012:0554 vendor-advisory
- https://github.com/torvalds/linux/commit/371528caec553785c37f73fa3926ea0de84f986f
- 48898 third-party-advisory
- [oss-security] 20120307 Re: CVE request -- kernel: mm: memcg: unregistring of events attached to the same eventfd can lead to oops mailing-list
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.10
- 48964 third-party-advisory
- kernel-memcg-dos(73711) vdb-entry
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=371528caec553785c37f73fa3926ea0de84f986f
- FEDORA-2012-3712 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=800813