CVE-2011-1771

Name: CVE-2011-1771
Creator: NVD / NIST
Published: 2011-09-06T16:55:07.32+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.52%

Last modified Jun 16, 2026

CVE-2011-1771 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.52% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.52%

39.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	< 2.6.39

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=7797069305d13252fd66cf722aa8f2cbeb3c95cd
http://marc.info/?l=linux-cifs&m=130204357001849&w=2Exploit, Third Party Advisory
http://marc.info/?l=linux-cifs&m=130204730006155&w=2Third Party Advisory
http://securityreason.com/securityalert/8367Third Party Advisory
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39Release Notes, Vendor Advisory
http://www.openwall.com/lists/oss-security/2011/05/09/2Exploit, Mailing List, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=703016Exploit, Issue Tracking, Patch, Third Party Advisory
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=7797069305d13252fd66cf722aa8f2cbeb3c95cd
http://marc.info/?l=linux-cifs&m=130204357001849&w=2Exploit, Third Party Advisory
http://marc.info/?l=linux-cifs&m=130204730006155&w=2Third Party Advisory
http://securityreason.com/securityalert/8367Third Party Advisory
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39Release Notes, Vendor Advisory
http://www.openwall.com/lists/oss-security/2011/05/09/2Exploit, Mailing List, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=703016Exploit, Issue Tracking, Patch, Third Party Advisory

Timeline

Published: Sep 6, 2011
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2011-1771?

How severe is CVE-2011-1771?

CVE-2011-1771 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.52% probability of exploitation in the next 30 days.

How do I fix CVE-2011-1771?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2011-1771?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST