CVE-2011-4621

MEDIUMNVD 5.55.5—Trending — 4 sources updated this week

5.5

The Linux kernel before 2.6.37 does not properly implement a certain clock-update optimization, which allows local users to cause a denial of service (system hang) via an application that executes code in a loop.

CVSS v3: 5.5
EG Score: 5.5(medium)
EPSS: 20.0%
KEV: Not listed

Published

May 17, 2012

Last Modified

April 29, 2026

Advisory Details (3)

Auto-updated May 29, 2026

Patch available. Sources: github_commit, redhat.

github_commit

commit f26f9aff6aaf (torvalds/linux)

Fix landed in torvalds/linux commit f26f9aff6aaf — awaiting tagged release

https://github.com/torvalds/linux/commit/f26f9aff6aaf67e9a430d16c266f91b13a5bff64

redhat Patch Available

769711 – (CVE-2011-4621) CVE-2011-4621 kernel: tight loop and no preemption can cause system stall

Affected: Red Hat Enterprise Linux 5 and Red Hat Enterprise MRG 2.

https://bugzilla.redhat.com/show_bug.cgi?id=769711

generic

oss-security - Re: CVE Request -- kernel: tight loop and no preemption can cause system stall

http://www.openwall.com/lists/oss-security/2011/12/21/6

Patch Availability(5)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	linux-image-2.6.35-903-omap4 (2.6.35-903.32) @ maverick	2026-05-29	ubuntu
ubuntu	linux-image-2.6.35-27-virtual (2.6.35-27.48) @ maverick	2026-05-29	ubuntu
ubuntu	linux-image-2.6.38-1209-omap4 (2.6.38-1209.15) @ natty	2026-05-29	ubuntu
ubuntu	linux-image-2.6.35-30-virtual (2.6.35-30.56~lucid1) @ lucid	2026-05-29	ubuntu
redhat	kernel-0:2.6.32-220.2.1.el6	2011-12-22	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-835Loop with Unreachable Exit Condition (Infinite Loop)

All Vendor Advisories

(5)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 16× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:10 UTCepss_batch
2026-06-02 20:10 UTCepss_batch
2026-06-01 13:49 UTCepss_batch
2026-06-01 13:49 UTCepss_batch
2026-05-31 22:28 UTCepss_batch
2026-05-31 22:28 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-29 13:40 UTCepss_batch
2026-05-29 04:34 UTCEG score recompute
2026-05-29 04:34 UTCVendor advisory
2026-05-29 04:34 UTCGHSA enrichment
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:41 UTCepss_batch
2026-05-26 13:41 UTCepss_batch

Frequently asked(5)

What is CVE-2011-4621?

CVE-2011-4621 is a medium vulnerability published on May 17, 2012. The Linux kernel before 2.6.37 does not properly implement a certain clock-update optimization, which allows local users to cause a denial of service (system hang) via an application that executes code in a loop.

When was CVE-2011-4621 disclosed?

CVE-2011-4621 was first published in the National Vulnerability Database on May 17, 2012, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2011-4621 actively exploited?

CVE-2011-4621 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 20.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2011-4621?

CVE-2011-4621 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2011-4621?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-4621, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2011-4621

Published

Last Modified

Advisory Details (3)

commit f26f9aff6aaf (torvalds/linux)

769711 – (CVE-2011-4621) CVE-2011-4621 kernel: tight loop and no preemption can cause system stall

oss-security - Re: CVE Request -- kernel: tight loop and no preemption can cause system stall

Patch Availability(5)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2011-4621?

Same vendor

Same CWE

CVE-2011-4621

📅 Published

🔄 Last Modified

📋 Advisory Details (3)

commit f26f9aff6aaf (torvalds/linux)

769711 – (CVE-2011-4621) CVE-2011-4621 kernel: tight loop and no preemption can cause system stall

oss-security - Re: CVE Request -- kernel: tight loop and no preemption can cause system stall

Patch Availability(5)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2011-4621?

🔗 Related CVEs(same vendor + same CWE)

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Last Modified

Advisory Details (3)

Frequently asked(5)

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