Tony Griffiths has reported a vulnerability in the Linux Kernel, which can be exploited malicious, local users to cause a DoS (Denial of Service).
The vulnerability is cause due to a memory corruption error in the "dentry_unused" list within the "prune_dcache()" function. This can be exploited to crash the kernel when running on SMP hardware by causing a race condition such that one or more tasks exit while another task is reading their /proc entries.
The vulnerability has been reported in versions 2.6.15 through 2.6.17. Other versions may also be affected.
Solution: Grant only trusted users access to affected systems.
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Subject: Linux Kernel SMP "/proc" Race Condition Denial of Service
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