Race condition in the key_gc_unused_keys function in security/keys/gc.c in the Linux kernel through 3.18.2 allows local users to cause a denial of service (memory corruption or panic) or possibly have unspecified other impact via keyctl commands that trigger access to a key structure member during garbage collection of a key.
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a3a8784454692dd72e5d5d34dcdab17b4420e74c
lists.fedoraproject.org/pipermail/package-announce/2015-January/147864.html
lists.fedoraproject.org/pipermail/package-announce/2015-January/147973.html
lists.opensuse.org/opensuse-security-announce/2015-04/msg00009.html
rhn.redhat.com/errata/RHSA-2015-0864.html
rhn.redhat.com/errata/RHSA-2015-1137.html
rhn.redhat.com/errata/RHSA-2015-1138.html
www.debian.org/security/2015/dsa-3128
www.mandriva.com/security/advisories?name=MDVSA-2015:058
www.openwall.com/lists/oss-security/2015/01/06/10
www.securityfocus.com/bid/71880
www.securitytracker.com/id/1036763
www.ubuntu.com/usn/USN-2511-1
www.ubuntu.com/usn/USN-2512-1
www.ubuntu.com/usn/USN-2513-1
www.ubuntu.com/usn/USN-2514-1
www.ubuntu.com/usn/USN-2515-1
www.ubuntu.com/usn/USN-2516-1
www.ubuntu.com/usn/USN-2517-1
www.ubuntu.com/usn/USN-2518-1
bugzilla.redhat.com/show_bug.cgi?id=1179813
exchange.xforce.ibmcloud.com/vulnerabilities/99641
github.com/torvalds/linux/commit/a3a8784454692dd72e5d5d34dcdab17b4420e74c