linux kernel panic via futex

2011-01-18 / 2011-01-19
Credit: taviso
Risk: Low
Local: Yes
Remote: No

CVSS Base Score: 4.9/10
Impact Subscore: 6.9/10
Exploitability Subscore: 3.9/10
Exploit range: Local
Attack complexity: Low
Authentication: No required
Confidentiality impact: None
Integrity impact: None
Availability impact: Complete

__futex_atomic_op1, __futex_atomic_op2, and futex_atomic_cmpxchg-_inatomic() macros replaced the LOCK prefix with a NOP instruction. This can cause the exceptions to not match the exception table fault fixup. A local, unprivileged user could use this flaw to cause a denial of service. This is assigned with CVE-2010-3086. Thanks, Eugene


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