CVE-2014-7843

Published: 29 November 2014

The __clear_user function in arch/arm64/lib/clear_user.S in the Linux kernel before 3.17.4 on the ARM64 platform allows local users to cause a denial of service (system crash) by reading one byte beyond a /dev/zero page boundary.

From the Ubuntu security team

Miloš Prchlík reported a flaw in how the ARM64 platform handles a single byte overflow in __clear_user. A local user could exploit this flaw to cause a denial of service (system crash) by reading one byte beyond a /dev/zero page boundary.

Priority

Medium

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr)
Released (3.13.0-44.73)
Patches:
Introduced by 0aea86a2176c22647a5b683768f858d880d5e05b
Fixed by 97fc15436b36ee3956efad83e22a557991f7d19d
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-ec2
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Patches:
DNE
This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was released [3.16.0-29.39~14.04.1])
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was not-affected [3.19.0-18.18~14.04.1])
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-mvl-dove
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc5)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Notes

AuthorNote
jdstrand
android kernels (flo, goldfish, grouper, maguro, mako and manta) are
not supported on the Ubuntu Touch 14.04 preview kernels
linux-lts-saucy no longer receives official support
linux-lts-quantal no longer receives official support

References

Bugs