Public Date:
747106: CVE-2011-4131 kernel: nfs4_getfacl decoding kernel oops

The MITRE CVE dictionary describes this issue as:

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.

Find out more about CVE-2011-4131 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue does not affect the Linux kernel as shipped with Red Hat Enterprise Linux 4 as it does not provide support for NFS ACLs. This issue does not affect the Linux kernel as shipped with Red Hat Enterprise Linux 5. This has been addressed in Red Hat Enterprise MRG via Future kernel updates in Red Hat Enterprise Linux 6 may address this issue.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 4.6
Base Metrics AV:A/AC:H/Au:N/C:N/I:N/A:C
Access Vector Adjacent Network
Access Complexity High
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux version 6 (kernel) RHSA-2012:0862 2012-06-19
Red Hat Enterprise Linux Server EUS (v. 6.2) (kernel) RHSA-2012:1541 2012-12-04
MRG Grid for RHEL 6 Server v.2 (kernel-rt) RHSA-2012:0333 2012-02-23

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 5 kernel Not affected
Red Hat Enterprise Linux 4 kernel Not affected


Red Hat would like to thank Andy Adamson for reporting this issue.