TITLE:
Linux Kernel "lease_init()" Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA20083

VERIFY ADVISORY:
http://secunia.com/advisories/20083/

CRITICAL:
Not critical

IMPACT:
DoS

WHERE:
Local system

OPERATING SYSTEM:
Linux Kernel 2.6.x
http://secunia.com/product/2719/

DESCRIPTION:
A vulnerability has been reported in the Linux Kernel, which
potentially can be exploited by malicious, local users to cause a DoS
(Denial of Service).

The vulnerability is caused due to a error within the "lease_init()"
function in "fs/locks.c". This causes it to free memory that may not
have been allocated using the "locks_alloc_lock()" function. This may
cause the kernel to crash when the "fcntl_setlease()" function is
called.

Note: A slab leak in "__setlease()" due to an uninitialised return
value has also been reported.

SOLUTION:
Update to version 2.6.16.16.
http://kernel.org/

PROVIDED AND/OR DISCOVERED BY:
Daniel Hokka Zakrisson and B. Steinbrink.

ORIGINAL ADVISORY:
Kernel.org:
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.16
http://www.kernel.org/git/?p=linux/kernel/git/stable/linux-2.6.16.y.git;a=commit;h=1f0e637c94a9b041833947c79110d6c02fff8618

----------------------------------------------------------------------

About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

----------------------------------------------------------------------

Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org

----------------------------------------------------------------------