The copy_creds function in kernel/cred.c in the Linux kernel before 3.3.2 provides an invalid replacement session keyring to a child process, which allows local users to cause a denial of service (panic) via a crafted application that uses the fork system call.
Exploitability
AV:LAC:MAu:NImpact
C:NI:NA:C4.7/AV:L/AC:M/Au:N/C:N/I:N/A:C