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TITLE:
Linux Kernel "clock_nanosleep()" NULL Pointer Dereference

SECUNIA ADVISORY ID:
SA36200

VERIFY ADVISORY:
http://secunia.com/advisories/36200/

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

The vulnerability is caused due to an error within the
"clock_nanosleep()" function in kernel/posix-timers.c. This can be
exploited to trigger a NULL-pointer dereference by calling
"clock_nanosleep()" with a clock id equal to CLOCK_MONOTONIC_RAW.

The vulnerability is reported in versions 2.6.28 and later. Other
versions may also be affected.

SOLUTION:
Fixed in the GIT repository:
http://git.kernel.org/linus/70d715fd0597f18528f389b5ac59102263067744

PROVIDED AND/OR DISCOVERED BY:
Hiroshi Shimamoto

ORIGINAL ADVISORY:
http://lkml.org/lkml/2009/8/4/28
http://lkml.org/lkml/2009/8/4/40

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