Race condition in the setsid function in Linux before 2.6.8.1 allows local users to cause a denial of service (crash) and possibly access portions of kernel memory, related to TTY changes, locking, and semaphores.
Exploitability
AV:LAC:HAu:NImpact
C:CI:CA:C6.2/AV:L/AC:H/Au:N/C:C/I:C/A:C