A "missing serialization" error in the unix_dgram_recvmsg function in Linux 2.4.27 and earlier, and 2.6.x up to 2.6.9, allows local users to gain privileges via a race condition.
Exploitability
AV:LAC:HAu:NImpact
C:CI:CA:C6.2/AV:L/AC:H/Au:N/C:C/I:C/A:C