CVE-2011-2521: n/a vulnerability

CVE-2011-2521: The x86_assign_hw_event function in arch/x86/kernel/cpu/perf_event.c in the Performance Events subsystem in...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 23:00 UTC (UTC+00:00)

Security readout for executives and security teams

This is an older Linux kernel flaw where a local user could trigger a system crash through the perf performance monitoring tool. The business impact is availability loss, not data theft or remote compromise, based on the supplied sources. Exposure is most likely on legacy x86 Linux systems running kernels before 2.6.39 or vendor kernels without the upstream backport. Systems without untrusted local users have lower practical exposure. Treat this as a legacy availability risk. It should not displace actively exploited remote vulnerabilities, but it matters for old multi-user Linux systems where a crash would disrupt business operations. Mitigation focus: Upgrade to a kernel version containing the upstream fix or a vendor backport.; Check distribution vendor guidance for affected package versions and supported fixes.; Prioritize legacy multi-user systems where untrusted users can access perf..

Prepared: Jun 24, 2026, 12:34 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: May 24, 2012, 23:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://github.com/torvalds/linux/commit/fc66c5210ec2539e800e87d7b3a985323c7be96eCVE reference · x_refsource_CONFIRM
https://bugzilla.redhat.com/show_bug.cgi?id=719228CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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