CVE-2016-0821

Published: 12 March 2016

The LIST_POISON feature in include/linux/poison.h in the Linux kernel before 4.3, as used in Android 6.0.1 before 2016-03-01, does not properly consider the relationship to the mmap_min_addr value, which makes it easier for attackers to bypass a poison-pointer protection mechanism by triggering the use of an uninitialized list entry, aka Android internal bug 26186802, a different vulnerability than CVE-2015-3636.

From the Ubuntu security team

Zach Riggle discovered that the Linux kernel's list poison feature did not take into account the mmap_min_addr value. A local attacker could use this to bypass the kernel's poison-pointer protection mechanism while attempting to exploit an existing kernel vulnerability.

Priority

Medium

CVSS 3 base score: 7.5

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
Patches:
Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Fixed by 8a5e5e02fc83aaf67053ab53b359af08c6c49aaf
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
linux-gke
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)
linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (4.3~rc1)