Technical Description

A vulnerability has been identified in Linux Kernel, which could be exploited by local attackers to bypass security restrictions, cause a denial of service or potentially gain elevated privileges. This issue is caused due to insufficient range checks in certain fault handlers within the "drivers/char/drm/drm_vm.c", "drivers/char/mspec.c", "fs/ncpfs/mmap.c", "kernel/relay.c", "mm/mmap.c", "sound/oss/via82cxxx_audio.c", "sound/usb/usx2y/usX2Yhwdep.c" and "sound/usb/usx2y/usx2yhwdeppcm.c" files, which could be exploited by local attackers to potentially read or write arbitrary kernel memory.

Affected Products

Linux Kernel versions 2.6.x
Linux Kernel versions 2.4.x

Solution

Upgrade to Linux Kernel version 2.6.22.17 or 2.4.36.1 :
http://www.kernel.org

References

http://www.vupen.com/english/advisories/2008/0445
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.22.17
http://www.kernel.org/pub/linux/kernel/v2.4/ChangeLog-2.4.36.1

Credits

Vulnerability reported by the vendor.

ChangeLog

2008-02-07 : Initial release
2008-02-18 : Updated Solution

Vulnerability Management

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