Some vulnerabilities have been reported in the Linux Kernel, which can be exploited by malicious, local users to disclose potentially sensitive information or to cause a DoS (Denial of Service).

1) An error exists within the "snd_seq_oss_synth_make_info()" function in sound/core/seq/oss/seq_oss_synth.c. This can be exploited to disclose potentially sensitive memory by passing an invalid device number to the vulnerable function.

2) An error exists within the VFS lookup functionality when handling deleted directories. This can be exploited to install a child dentry for a deleted directory and cause a crash on certain filesystems (e.g. UBIFS).

3) An error within the "shmem_delete_inode()" function in mm/shmem.c can be exploited to trigger a kernel BUG via certain file operations.

Vulnerabilities #1 and #2 are reported in versions prior to 2.6.26.2. Vulnerability #3 is reported in versions prior to 2.6.26.1.

Solution
Update to version 2.6.26.2.

Provided and/or discovered by
The vendor credits:
1) Tobias Klein
2) Zoltan Sogor
3) Kel Modderman

Changelog
Further details available to Secunia VIM customers

Original Advisory
Linux Kernel:
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.26.2
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=82e68f7ffec3800425f2391c8c86277606860442
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=d70b67c8bc72ee23b55381bd6a884f4796692f77
http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.26.y.git;a=commit;h=14fcc23fdc78e9d32372553ccf21758a9bd56fa1

Tobias Klein:
http://trapkit.de/advisories/TKADV2008-005.txt

Deep Links
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