CVE-2011-2521

The x86_assign_hw_event function in arch/x86/kernel/cpu/perf_event.c in the Performance Events...

4.9 MediumFix available

CVE-2011-2521 is a medium vulnerability (CVSS 4.9) in Linux Kernel, published May 24, 2012. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.39%, the 33rd percentile. Fixed in kernel 0:2.6.32-131.17.1.el6.

The x86_assign_hw_event function in arch/x86/kernel/cpu/perf_event.c in the Performance Events subsystem in the Linux kernel before 2.6.39 does not properly calculate counter values, which allows local users to cause a denial of service (panic) via the perf program.

Exploit likelihood

0.39%Down 0.6 points since Feb 4, 2022

What each source reports

NVD Score used 4.9

Record: CVE-2011-2521
CVSS 2.0: 4.9 MediumAV:L/AC:L/Au:N/C:N/I:N/A:C
Weakness: CWE-189
Updated: 2026-11-02

CVE List No score

Record: CVE-2011-2521
Updated: 2026-11-02

EUVDEUVD-2011-2506 No score

Record: EUVD-2011-2506
Updated: 2026-11-03

GitHub AdvisoriesGHSA-xr3h-hfcp-qxhf No score

The x86_assign_hw_event function in arch/x86/kernel/cpu/perf_event.c in the Performance Events...

Record: GHSA-xr3h-hfcp-qxhf
Updated: 2026-11-02

Affected products

linux kernel

Affected packages

Affected packages
Package	Affected	Fixed
`kernel` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.17.1.el6	0:2.6.32-131.17.1.el6
`kernel-bootwrapper` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.17.1.el6	0:2.6.32-131.17.1.el6
`kernel-debug` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.17.1.el6	0:2.6.32-131.17.1.el6
`kernel-debug-debuginfo` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.17.1.el6	0:2.6.32-131.17.1.el6
`kernel-debug-devel` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.17.1.el6	0:2.6.32-131.17.1.el6
`kernel-debuginfo` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.17.1.el6	0:2.6.32-131.17.1.el6
`kernel-debuginfo-common-i686` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.17.1.el6	0:2.6.32-131.17.1.el6
`kernel-debuginfo-common-ppc64` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.17.1.el6	0:2.6.32-131.17.1.el6
`kernel-debuginfo-common-s390x` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.17.1.el6	0:2.6.32-131.17.1.el6
`kernel-debuginfo-common-x86_64` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.17.1.el6	0:2.6.32-131.17.1.el6

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Affected packages
Package	Affected	Fixed
`kernel-devel` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.17.1.el6	0:2.6.32-131.17.1.el6
`kernel-doc` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.17.1.el6	0:2.6.32-131.17.1.el6
`kernel-firmware` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.17.1.el6	0:2.6.32-131.17.1.el6
`kernel-headers` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.17.1.el6	0:2.6.32-131.17.1.el6
`kernel-kdump` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.17.1.el6	0:2.6.32-131.17.1.el6
`kernel-kdump-debuginfo` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.17.1.el6	0:2.6.32-131.17.1.el6
`kernel-kdump-devel` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.17.1.el6	0:2.6.32-131.17.1.el6
`perf` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.17.1.el6	0:2.6.32-131.17.1.el6
`perf-debuginfo` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.17.1.el6	0:2.6.32-131.17.1.el6

History

History
When	Changed	Sources
2026-11-03	aliases	EUVD
2026-11-02	created	CVE List, GitHub Advisories, NVD, OSV

References

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