CVE-2011-4131

Severity: medium (CVSS 4.6 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2012-05-17 · updated 2026-06-16
Weakness: CWE-189

Description

The NFSv4 implementation in the Linux kernel before 3.2.2 does not properly handle bitmap sizes in GETACL replies, which allows remote NFS servers to cause a denial of service (OOPS) by sending an excessive number of bitmap words.

Affected products

Linux kernel: 3.2, 3.2-rc2, 3.2-rc3, 3.2-rc4, 3.2-rc5, 3.2-rc6 (+2)

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=bf118a342f10dafe44b14451a1392c3254629a1f
http://lists.fedoraproject.org/pipermail/package-announce/2012-May/081280.html
http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00021.html
http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html
http://rhn.redhat.com/errata/RHSA-2012-0862.html
http://rhn.redhat.com/errata/RHSA-2012-1541.html
http://secunia.com/advisories/48898
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2
http://www.openwall.com/lists/oss-security/2011/11/12/1
https://bugzilla.redhat.com/show_bug.cgi?id=747106
https://github.com/torvalds/linux/commit/bf118a342f10dafe44b14451a1392c3254629a1f
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=bf118a342f10dafe44b14451a1392c3254629a1f

Get alerted when CVE-2011-4131 or the next vulnerability affects your stack