Is CVE-2011-2491 being actively exploited?

CVE-2011-2491 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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

CVE-2011-2491 has a CVSS 2.0 base score of 4.9 (MEDIUM).

CVE-2011-2491

MEDIUM · CVSS 4.9EPSS 0.4%EU EUVD

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.

Key facts

CVSS score: 4.9 (v2.0)
Severity: MEDIUM
CVSS vector: AV:L/AC:L/Au:N/C:N/I:N/A:C
Weakness (CWE): CWE-400
EPSS score: 0.4% (34th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2011-2478)
Published: March 1, 2013
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-2478 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

linux / linux kernel
redhat / enterprise linux desktop
redhat / enterprise linux server
redhat / enterprise linux workstation

Certified products that may be affected

1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.

Red Hat Enterprise Linux 5 OpenSSH-Server Cryptographic Module - Red Hat®, Inc. - FIPS 140 1384 - historical

References

http://ftp.osuosl.org/pub/linux/kernel/v3.0/ChangeLog-3.0(Broken Link)
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=0b760113a3a155269a3fba93a409c640031dd68f
http://rhn.redhat.com/errata/RHSA-2011-1212.html(Third Party Advisory)
http://www.openwall.com/lists/oss-security/2011/06/23/6(Mailing List, Patch, Third Party Advisory)
https://bugzilla.redhat.com/show_bug.cgi?id=709393(Issue Tracking, Patch, Third Party Advisory)
https://github.com/torvalds/linux/commit/0b760113a3a155269a3fba93a409c640031dd68f(Patch, Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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