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CVE-2016-9794

Published: 28 December 2016

Race condition in the snd_pcm_period_elapsed function in sound/core/pcm_lib.c in the ALSA subsystem in the Linux kernel before 4.7 allows local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via a crafted SNDRV_PCM_TRIGGER_START command.

From the Ubuntu security team

Baozeng Ding discovered a race condition that could lead to a use-after- free in the Advanced Linux Sound Architecture (ALSA) subsystem of the Linux kernel. A local attacker could use this to cause a denial of service (system crash).

Priority

Low

CVSS 3 base score: 7.8

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Patches:
Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Fixed by 3aa02cb664c5fb1042958c8d1aa8c35055a2ebc4
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-gke
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)