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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.

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

Low

CVSS 3 base score: 5.5

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian 		precise
Released (3.2.0-105.146)
trusty
Released (3.13.0-91.138)
upstream
Released (4.7~rc1)
wily
Released (4.2.0-41.48)
xenial
Released (4.4.0-28.47)
yakkety Not vulnerable
(4.4.0-25.44)
zesty Not vulnerable
(4.8.0-22.24)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by 9a47e9cff994f37f7f0dbd9ae23740d0f64f9fe6
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by e4ec8cc8039a7063e24204299b462bd1383184a5
linux-armadaxp
Launchpad, Ubuntu, Debian 		precise Does not exist
(precise was released [3.2.0-1668.93])
trusty Does not exist

upstream
Released (4.7~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-aws
Launchpad, Ubuntu, Debian 		precise Does not exist

trusty Not vulnerable
(4.4.0-1002.2)
upstream
Released (4.7~rc1)
xenial Not vulnerable
(4.4.0-1001.10)
yakkety Does not exist

zesty Does not exist

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

trusty Does not exist
(trusty was ignored)
upstream
Released (4.7~rc1)
wily Ignored
(reached end-of-life)
xenial Ignored
(abandoned)
yakkety Ignored
(abandoned)
zesty Does not exist

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

trusty Does not exist

upstream
Released (4.7~rc1)
xenial Not vulnerable
(4.4.0-1003.3)
yakkety Does not exist

zesty Does not exist

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

trusty Does not exist
(trusty was ignored)
upstream
Released (4.7~rc1)
wily Ignored
(reached end-of-life)
xenial Ignored
(abandoned)
yakkety Ignored
(abandoned)
zesty Ignored
(abandoned)
linux-grouper
Launchpad, Ubuntu, Debian 		precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.7~rc1)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

trusty Does not exist

upstream
Released (4.7~rc1)
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 		precise Does not exist

trusty Does not exist

upstream
Released (4.7~rc1)
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 		precise Does not exist
(precise was ignored [abandoned])
trusty Does not exist

upstream
Released (4.7~rc1)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-linaro-shared
Launchpad, Ubuntu, Debian 		precise Does not exist
(precise was ignored [abandoned])
trusty Does not exist

upstream
Released (4.7~rc1)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-linaro-vexpress
Launchpad, Ubuntu, Debian 		precise Does not exist
(precise was ignored [abandoned])
trusty Does not exist

upstream
Released (4.7~rc1)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-quantal
Launchpad, Ubuntu, Debian 		precise Does not exist
(precise was ignored [end-of-life])
trusty Does not exist

upstream
Released (4.7~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 Does not exist
(precise was ignored [end-of-life])
trusty Does not exist

upstream
Released (4.7~rc1)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-saucy
Launchpad, Ubuntu, Debian 		precise Does not exist
(precise was ignored [end-of-life])
trusty Does not exist

upstream
Released (4.7~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 (3.13.0-91.138~precise1)
trusty Does not exist

upstream
Released (4.7~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 Does not exist
(trusty was released [3.16.0-76.98~14.04.1])
upstream
Released (4.7~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 Does not exist
(trusty was released [3.19.0-64.72~14.04.1])
upstream
Released (4.7~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 Does not exist
(trusty was released [4.2.0-41.48~14.04.1])
upstream
Released (4.7~rc1)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

trusty
Released (4.4.0-28.47~14.04.1)
upstream
Released (4.7~rc1)
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 (4.7~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 (4.7~rc1)
wily Ignored
(reached end-of-life)
xenial Ignored
(abandoned)
yakkety Ignored
(abandoned)
zesty Does not exist

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

trusty Does not exist
(trusty was ignored)
upstream
Released (4.7~rc1)
wily Ignored
(reached end-of-life)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-qcm-msm
Launchpad, Ubuntu, Debian 		precise Does not exist
(precise was ignored [abandoned])
trusty Does not exist

upstream
Released (4.7~rc1)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

trusty Does not exist

upstream
Released (4.7~rc1)
wily
Released (4.2.0-1033.43)
xenial
Released (4.4.0-1016.22)
yakkety Not vulnerable
(4.4.0-1013.17)
zesty Not vulnerable
(4.8.0-1013.15)
linux-snapdragon
Launchpad, Ubuntu, Debian 		precise Does not exist

trusty Does not exist

upstream
Released (4.7~rc1)
wily Does not exist

xenial
Released (4.4.0-1019.22)
yakkety Not vulnerable
(4.4.0-1016.19)
zesty Not vulnerable
(4.4.0-1029.32)
linux-ti-omap4
Launchpad, Ubuntu, Debian 		precise Does not exist
(precise was released [3.2.0-1483.110])
trusty Does not exist

upstream
Released (4.7~rc1)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

References

Bugs

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