Description
The nfs_can_extend_write function in fs/nfs/write.c in the Linux kernel before 3.13.3 relies on a write delegation to extend a write operation without a certain up-to-date verification, which allows local users to obtain sensitive information from kernel memory in opportunistic circumstances by writing to a file in an NFS filesystem and then reading the same file.
References (7)
Core 7
Core References
Third Party Advisory vendor-advisory
x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-2137-1
Third Party Advisory vendor-advisory
x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-2140-1
Patch, Third Party Advisory x_refsource_confirm
https://github.com/torvalds/linux/commit/263b4509ec4d47e0da3e753f85a39ea12d1eff24
Patch x_refsource_confirm
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=263b4509ec4d47e0da3e753f85a39ea12d1eff24
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
http://www.openwall.com/lists/oss-security/2014/02/20/16
Release Notes, Vendor Advisory x_refsource_confirm
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.13.3
Issue Tracking, Patch, Third Party Advisory x_refsource_confirm
https://bugzilla.redhat.com/show_bug.cgi?id=1066939
Scores
EPSS
0.0041
EPSS Percentile
33.3%
Details
CWE
CWE-200
Status
published
Products (3)
canonical/ubuntu_linux
12.04
canonical/ubuntu_linux
13.10
linux/linux_kernel
< 3.13.3
Published
Feb 28, 2014
Tracked Since
Feb 18, 2026