CVE-2011-1771

Published: 06 September 2011

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.

From the Ubuntu security team

Ben Greear discovered that CIFS did not correctly handle direct I/O. A local attacker with access to a CIFS partition could exploit this to crash the system, leading to a denial of service.

Priority

Medium

CVSS 3 base score: 7.8

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.39~rc4)
Patches:
Introduced by cdff08e76612e53580139653403aedea979aa639
Fixed by 7797069305d13252fd66cf722aa8f2cbeb3c95cd
linux-ec2
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.39~rc4)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.39~rc4)
linux-lts-backport-maverick
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.39~rc4)
linux-lts-backport-natty
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.39~rc4)
linux-lts-backport-oneiric
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.39~rc4)
linux-mvl-dove
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.39~rc4)
linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.39~rc4)