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.
http://lists.fedoraproject.org/pipermail/package-announce/2012-March/075781.html
http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00021.html
http://secunia.com/advisories/48898
http://secunia.com/advisories/48964
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.10
http://www.openwall.com/lists/oss-security/2012/03/07/3
https://bugzilla.redhat.com/show_bug.cgi?id=800813
https://exchange.xforce.ibmcloud.com/vulnerabilities/73711
https://github.com/torvalds/linux/commit/371528caec553785c37f73fa3926ea0de84f986f
Source: MITRE
Published: 2012-05-17
Updated: 2020-07-27
Type: CWE-476
Base Score: 4.9
Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C
Impact Score: 6.9
Exploitability Score: 3.9
Severity: MEDIUM
Base Score: 5.5
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 1.8
Severity: MEDIUM