CVE-2011-2521

Medium

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.

Package Linux Kernel
Published 2012-05-24
Last modified 2026-04-29
CVSS version 2.0
Patch available
Awaiting data

CVSS 2.0 score

4.9

out of 10
Medium
Attack Vector
Local
Attack Complexity
Low
Privileges Required
User Interaction
Scope
Confidentiality
Low
Integrity
None
Availability
Vector string
AV:L/AC:L/Au:N/C:N/I:N/A:C

Weakness type

CWE-189

CVE-2011-2521 is classified as CWE-189

See CWE-189 on MITRE CWE for full details on this weakness type.

References

5 total

Frequently asked questions

  • What is CVE-2011-2521?

    CVE-2011-2521 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.9 out of 10 . CVE-2011-2521 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2011-2521?

    CVE-2011-2521 has a CVSS score of 4.9 out of 10, rated Medium severity (CVSS 2.0). The vector string is AV:L/AC:L/Au:N/C:N/I:N/A:C .

  • Is there a patch available for CVE-2011-2521?

    Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2011-2521 patch availability.

  • Is CVE-2011-2521 actively exploited?

    No. CVE-2011-2521 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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