CVE-2014-9419

Published: 25 December 2014

The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel through 3.18.1 does not ensure that Thread Local Storage (TLS) descriptors are loaded before proceeding with other steps, which makes it easier for local users to bypass the ASLR protection mechanism via a crafted application that reads a TLS base address.

From the Ubuntu security team

A flaw was discovered in how Thread Local Storage (TLS) is handled by the task switching function in the Linux kernel for x86_64 based machines. A local user could exploit this flaw to bypass the Address Space Layout Radomization (ASLR) protection mechanism.

Priority

Medium

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
Patches:
Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Fixed by f647d7c155f069c1a068030255c300663516420e
linux-2.6
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-ec2
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-gke
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-mvl-dove
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)