The sock_alloc_send_pskb function in net/core/sock.c in the Linux kernel before 3.4.5 does not properly validate a certain length value, which allows local users to cause a denial of service (heap-based buffer overflow and system crash) or possibly gain privileges by leveraging access to a TUN/TAP device.
http://rhn.redhat.com/errata/RHSA-2012-0743.html
http://rhn.redhat.com/errata/RHSA-2012-1087.html
https://bugzilla.redhat.com/show_bug.cgi?id=816289
http://secunia.com/advisories/50807
https://github.com/torvalds/linux/commit/cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1cc
http://ubuntu.com/usn/usn-1529-1
Published: 2012-08-09
Base Score: 7.2
Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C
Severity: High