What is CVE-2011-2491?

CVE-2011-2491 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.9 out of 10, classified as a Uncontrolled Resource Consumption flaw (CWE-400). CVE-2011-2491 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2011-2491?

CVE-2011-2491 has a CVSS score of 4.9 out of 10, rated Medium severity. The vector string is AV:L/AC:L/Au:N/C:N/I:N/A:C.

Is there a patch available for CVE-2011-2491?

No patch is currently available for CVE-2011-2491. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2011-2491 actively exploited?

CVE-2011-2491 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Uncontrolled Resource Consumption (CWE-400)?

The product does not properly control the amount of resources it consumes, leading to exhaustion. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/400.html

CVE-2011-2491

Medium

The Network Lock Manager (NLM) protocol implementation in the NFS client functionality in the Linux kernel before 3.0 allows local users to cause a denial of service (system hang) via a LOCK_UN flock system call.

Package Linux Kernel

Published 2013-03-01

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-400

CVE-2011-2491 is a Uncontrolled Resource Consumption vulnerability

What is Uncontrolled Resource Consumption?

The product does not properly control the amount of resources it consumes, leading to exhaustion. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2011-2491 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Ftp
http://ftp.osuosl.org/pub/linux/kernel/v3.0/ChangeLog-3.0

Broken Link
Red Hat
http://rhn.redhat.com/errata/RHSA-2011-1212.html

Third Party Advisory
Kernel patch commit
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=0b760113a3a155269a3fba93a409c640031dd68f
Patch
Kernel patch commit
http://www.openwall.com/lists/oss-security/2011/06/23/6
Patch
Kernel patch commit
https://bugzilla.redhat.com/show_bug.cgi?id=709393
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2011-2491

Severity Medium

CVSS score 4.9 / 10

CVSS version 2.0

Published 2013-03-01

Modified 2026-04-29

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2011-2491?

CVE-2011-2491 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.9 out of 10 , classified as an Uncontrolled Resource Consumption flaw (CWE-400) . CVE-2011-2491 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2011-2491?

CVE-2011-2491 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-2011-2491?

No patch is currently available for CVE-2011-2491. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2011-2491 actively exploited?

No — CVE-2011-2491 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Uncontrolled Resource Consumption (CWE-400)?

The product does not properly control the amount of resources it consumes, leading to exhaustion. View CWE-400 on MITRE CWE →