CVE-2016-4578

Published: 23 May 2016

sound/core/timer.c in the Linux kernel through 4.6 does not initialize certain r1 data structures, which allows local users to obtain sensitive information from kernel stack memory via crafted use of the ALSA timer interface, related to the (1) snd_timer_user_ccallback and (2) snd_timer_user_tinterrupt functions.

From the Ubuntu security team

Kangjie Lu discovered an information leak in the timer handling implementation in the Advanced Linux Sound Architecture (ALSA) subsystem of the Linux kernel. A local attacker could use this to obtain potentially sensitive information from kernel memory.

Priority

Low

CVSS 3 base score: 5.5

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.4.0-28.47)
Ubuntu 14.04 ESM (Trusty Tahr)
Released (3.13.0-91.138)
Patches:
Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Fixed by 9a47e9cff994f37f7f0dbd9ae23740d0f64f9fe6
Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Fixed by e4ec8cc8039a7063e24204299b462bd1383184a5
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (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 (4.7~rc1)
Ubuntu 16.04 ESM (Xenial Xerus) Not vulnerable
(4.4.0-1001.10)
Ubuntu 14.04 ESM (Trusty Tahr) Not vulnerable
(4.4.0-1002.2)
linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (Xenial Xerus) Ignored
(abandoned)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-gke
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (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 (4.7~rc1)
Ubuntu 16.04 ESM (Xenial Xerus) Ignored
(abandoned)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (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 (4.7~rc1)
Ubuntu 16.04 ESM (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 (4.7~rc1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (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-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (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-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was released [3.16.0-76.98~14.04.1])
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was released [3.19.0-64.72~14.04.1])
linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was released [4.2.0-41.48~14.04.1])
linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr)
Released (4.4.0-28.47~14.04.1)
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (Xenial Xerus) Ignored
(abandoned)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.4.0-1016.22)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.4.0-1019.22)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist