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CVE-2016-2548

Published: 24 February 2016

sound/core/timer.c in the Linux kernel before 4.4.1 retains certain linked lists after a close or stop action, which allows local users to cause a denial of service (system crash) via a crafted ioctl call, related to the (1) snd_timer_close and (2) _snd_timer_stop functions.

From the Ubuntu security team

Dmitry Vyukov discovered that the Advanced Linux Sound Architecture (ALSA) framework's handling of high resolution timers did not properly manage its data structures. A local attacker could use this to cause a denial of service (system hang or crash) or possibly execute arbitrary code.

Priority

Medium

CVSS 3 base score: 6.2

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
Patches:
Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Fixed by b5a663aa426f4884c71cd8580adae73f33570f0d
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
linux-gke
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)
linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (4.5~rc1)