Your submission was sent successfully! Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

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.

Notes

AuthorNote
jdstrand
android kernels (flo, goldfish, grouper, maguro, mako and manta) are
not supported on the Ubuntu Touch 14.10 and earlier preview kernels
linux-lts-saucy no longer receives official support
linux-lts-quantal no longer receives official support

Priority

Medium

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc1)
precise
Released (3.2.0-102.142)
trusty
Released (3.13.0-86.130)
wily
Released (4.2.0-36.41)
xenial Not vulnerable
(4.3.0-1.10)
yakkety Not vulnerable
(4.4.0-21.37)
zesty Not vulnerable
(4.8.0-22.24)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by 8a5e5e02fc83aaf67053ab53b359af08c6c49aaf
linux-armadaxp
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc1)
precise
Released (3.2.0-1665.90)
trusty Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc1)
precise Does not exist

trusty Not vulnerable
(4.4.0-1002.2)
xenial Not vulnerable
(4.4.0-1001.10)
yakkety Does not exist

zesty Does not exist

linux-flo
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc1)
precise Does not exist

trusty Does not exist
(trusty was ignored)
wily Ignored
(end of life)
xenial Ignored
(abandoned)
yakkety Ignored
(end of life)
zesty Does not exist

linux-gke
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc1)
precise Does not exist

trusty Does not exist

xenial Not vulnerable
(4.4.0-1003.3)
yakkety Does not exist

zesty Does not exist

linux-goldfish
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc1)
xenial Ignored
(abandoned)
yakkety Ignored
(end of life)
zesty Ignored
(end of life)
precise Does not exist

trusty Does not exist
(trusty was ignored)
wily Ignored
(end of life)
linux-grouper
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.3~rc1)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc1)
precise Does not exist

trusty Does not exist

xenial Not vulnerable
(4.8.0-36.36~16.04.1)
yakkety Does not exist

zesty Does not exist

linux-hwe-edge
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc1)
precise Does not exist

trusty Does not exist

xenial Not vulnerable
(4.8.0-36.36~16.04.1)
yakkety Does not exist

zesty Does not exist

linux-linaro-omap
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc1)
precise Ignored
(end of life)
trusty Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-linaro-shared
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc1)
precise Ignored
(end of life)
trusty Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-linaro-vexpress
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc1)
precise Ignored
(end of life)
trusty Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-quantal
Launchpad, Ubuntu, Debian
precise Ignored
(end of life)
trusty Does not exist

upstream
Released (4.3~rc1)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
precise Ignored
(end of life)
trusty Does not exist

upstream
Released (4.3~rc1)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-saucy
Launchpad, Ubuntu, Debian
precise Ignored
(end of life)
trusty Does not exist

upstream
Released (4.3~rc1)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
precise
Released (3.13.0-86.130~precise1)
trusty Does not exist

upstream
Released (4.3~rc1)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-utopic
Launchpad, Ubuntu, Debian
precise Does not exist

trusty
Released (3.16.0-71.91~14.04.1)
upstream
Released (4.3~rc1)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-vivid
Launchpad, Ubuntu, Debian
precise Does not exist

trusty
Released (3.19.0-59.65~14.04.1)
upstream
Released (4.3~rc1)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-wily
Launchpad, Ubuntu, Debian
precise Does not exist

trusty
Released (4.2.0-36.41~14.04.1)
upstream
Released (4.3~rc1)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-xenial
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc1)
precise Does not exist

trusty Not vulnerable
(4.4.0-13.29~14.04.1)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-maguro
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.3~rc1)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-mako
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.3~rc1)
wily Ignored
(end of life)
xenial Ignored
(abandoned)
yakkety Ignored
(end of life)
zesty Does not exist

linux-manta
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.3~rc1)
wily Ignored
(end of life)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-qcm-msm
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc1)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

precise Ignored
(end of life)
trusty Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist

upstream
Released (4.3~rc1)
wily
Released (4.2.0-1029.37)
xenial Not vulnerable
(4.3.0-1006.6)
yakkety Not vulnerable
(4.4.0-1009.10)
zesty Not vulnerable
(4.8.0-1013.15)
linux-snapdragon
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc1)
precise Does not exist

trusty Does not exist

wily Does not exist

xenial Not vulnerable
(4.4.0-1012.12)
yakkety Not vulnerable
(4.4.0-1012.12)
zesty Not vulnerable
(4.4.0-1029.32)
linux-ti-omap4
Launchpad, Ubuntu, Debian
precise
Released (3.2.0-1480.106)
trusty Does not exist

upstream
Released (4.3~rc1)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

Severity score breakdown

Parameter Value
Base score 5.5
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact High
Availability impact None
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N