CVE-2014-2038

Published: 28 February 2014

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.

From the Ubuntu security team

An information leak was discovered in the Linux kernel's NFS filesystem. A local users with write access to an NFS share could exploit this flaw to obtain potential sensative information from kernel memory.

Priority

Medium

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Not vulnerable
(4.2.0-16.19)
Ubuntu 14.04 ESM (Trusty Tahr) Not vulnerable
(3.13.0-10.30)
Patches:
Introduced by c7559663e42f4294ffe31fe159da6b6a66b35d61
Fixed by 263b4509ec4d47e0da3e753f85a39ea12d1eff24
linux-2.6
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Not vulnerable
(4.4.0-1001.10)
Ubuntu 14.04 ESM (Trusty Tahr) Not vulnerable
(4.4.0-1002.2)
linux-ec2
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Not vulnerable

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was not-affected)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-gke
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Not vulnerable
(4.4.0-1003.3)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Not vulnerable

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was not-affected)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored [abandoned])
linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Not vulnerable
(4.8.0-36.36~16.04.1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Not vulnerable
(4.8.0-36.36~16.04.1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was not-affected [3.16.0-25.33~14.04.2])
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was not-affected [3.19.0-18.18~14.04.1])
linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was not-affected [4.2.0-18.22~14.04.1])
linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Not vulnerable
(4.4.0-13.29~14.04.1)
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored [abandoned])
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Not vulnerable

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was not-affected)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was not-affected)
linux-mvl-dove
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Not vulnerable
(4.2.0-1013.19)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Not vulnerable
(4.4.0-1012.12)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (3.14~rc1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist