What is CVE-2011-4621?

CVE-2011-4621 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Infinite Loop flaw (CWE-835). CVE-2011-4621 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

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

CVE-2011-4621 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2011-4621?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2011-4621 patch availability.

Is CVE-2011-4621 actively exploited?

CVE-2011-4621 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Infinite Loop (CWE-835)?

The product contains an iteration that does not exit even when it should. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/835.html

CVE-2011-4621

Medium

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.

Package Linux Kernel

Published 2012-05-17

Last modified 2026-04-29

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-835

CVE-2011-4621 is a Infinite Loop vulnerability

What is Infinite Loop?

The product contains an iteration that does not exit even when it should. Learn more on MITRE CWE

References

5 total

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

Exploit Mailing List Patch Third Party Advisory
Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=769711

Issue Tracking Patch Third Party Advisory
GitHub
https://github.com/torvalds/linux/commit/f26f9aff6aaf67e9a430d16c266f91b13a5bff64

Patch Third Party Advisory
Ftp
http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.37

Broken Link
Kernel Git
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f26f9aff6aaf67e9a430d16c266f91b13a5bff64

Details

CVE ID CVE-2011-4621

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2012-05-17

Modified 2026-04-29

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2011-4621?

CVE-2011-4621 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Infinite Loop flaw (CWE-835) . CVE-2011-4621 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2011-4621?

CVE-2011-4621 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2011-4621?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2011-4621 patch availability.
Is CVE-2011-4621 actively exploited?

No. CVE-2011-4621 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.