The crypto API in the Linux kernel through 3.9-rc8 does not initialize certain length variables, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call, related to the hash_recvmsg function in crypto/algif_hash.c and the skcipher_recvmsg function in crypto/algif_skcipher.c.
Exploitability
AV:LAC:LAu:NImpact
C:CI:NA:N4.9/AV:L/AC:L/Au:N/C:C/I:N/A:N