Some vulnerabilities have been reported in the Linux Kernel, which can be exploited by malicious, local users to cause a DoS (Denial of Service) and gain escalated privileges.

1) An error in the i915 GEM ioctl interface can be exploited to write to an arbitrary kernel memory location.

2) An error within the "get_microcode32()" function in drivers/media/video/v4l2-compat-ioctl32.c can be exploited to gain escalated privileges via specially crafted IOCTLs.

Note: Successful exploitation requires a 64bit system and access to a video device.

3) KVM loads the host's FS and GS registers without additional verification, which can be exploited to e.g. cause a kernel panic by modifying the LDT and sending a KVM_RUN IOCTL.

Solution
Update to version 2.6.36.

Provided and/or discovered by
1, 2) Kees Cook
3) Disclosed in a GIT commit.

Changelog
Further details available to Secunia VIM customers

Original Advisory
1)http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.36-rc7
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=ce9d419dbecc292cc3e06e8b1d6d123d3fa813a4
2) http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=3e645d6b485446c54c6745c5e2cf5c528fe4deec
http://www.outflux.net/blog/archives/2010/10/19/cve-2010-2963-v4l-compat-exploit/
3) http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=9581d442b9058d3699b4be568b6e5eae38a41493

Deep Links
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