CVE-2011-1771

The cifs_close function in fs/cifs/file.c in the Linux kernel before 2.6.39 allows local users to...

7.8 HighFix available

The cifs_close function in fs/cifs/file.c in the Linux kernel before 2.6.39 allows local users to cause a denial of service (NULL pointer dereference and BUG) or possibly have unspecified other impact by setting the O_DIRECT flag during an attempt to open a file on a CIFS filesystem.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.52%Down 0.5 points since Feb 4, 2022

What each source reports

NVD Score used 7.8

Record: CVE-2011-1771
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 4.4 MediumAV:L/AC:M/Au:N/C:P/I:P/A:P
Weakness: CWE-476
Updated: 2026-11-02

CVE List No score

Record: CVE-2011-1771
Updated: 2026-11-02

EUVDEUVD-2011-1770 No score

Record: EUVD-2011-1770
Updated: 2026-11-03

GitHub AdvisoriesGHSA-68xv-2p42-wm3q 7.8

The cifs_close function in fs/cifs/file.c in the Linux kernel before 2.6.39 allows local users to...

Record: GHSA-68xv-2p42-wm3q
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-476
Updated: 2026-11-02

Affected products

linux kernel

Affected packages

Affected packages
Package	Affected	Fixed
`kernel` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.2.1.el6	0:2.6.32-131.2.1.el6
`kernel-bootwrapper` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.2.1.el6	0:2.6.32-131.2.1.el6
`kernel-debug` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.2.1.el6	0:2.6.32-131.2.1.el6
`kernel-debug-debuginfo` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.2.1.el6	0:2.6.32-131.2.1.el6
`kernel-debug-devel` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.2.1.el6	0:2.6.32-131.2.1.el6
`kernel-debuginfo` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.2.1.el6	0:2.6.32-131.2.1.el6
`kernel-debuginfo-common-i686` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.2.1.el6	0:2.6.32-131.2.1.el6
`kernel-debuginfo-common-ppc64` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.2.1.el6	0:2.6.32-131.2.1.el6
`kernel-debuginfo-common-s390x` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.2.1.el6	0:2.6.32-131.2.1.el6
`kernel-debuginfo-common-x86_64` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.2.1.el6	0:2.6.32-131.2.1.el6

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Affected packages
Package	Affected	Fixed
`kernel-devel` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.2.1.el6	0:2.6.32-131.2.1.el6
`kernel-doc` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.2.1.el6	0:2.6.32-131.2.1.el6
`kernel-firmware` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.2.1.el6	0:2.6.32-131.2.1.el6
`kernel-headers` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.2.1.el6	0:2.6.32-131.2.1.el6
`kernel-kdump` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.2.1.el6	0:2.6.32-131.2.1.el6
`kernel-kdump-debuginfo` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.2.1.el6	0:2.6.32-131.2.1.el6
`kernel-kdump-devel` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.2.1.el6	0:2.6.32-131.2.1.el6
`perf` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.2.1.el6	0:2.6.32-131.2.1.el6
`perf-debuginfo` Red Hat:enterprise_linux:6::server	before 0:2.6.32-131.2.1.el6	0:2.6.32-131.2.1.el6

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2011-1771 is a high vulnerability (CVSS 7.8) in Linux Kernel, published September 6, 2011. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.52%, the 44th percentile. Fixed in kernel 0:2.6.32-131.2.1.el6.

References

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