CVE-2016-9794

NameCVE-2016-9794
DescriptionRace 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-772-1
NVD severityhigh (attack range: local)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)wheezy3.2.78-1vulnerable
wheezy (security)3.2.96-3fixed
jessie3.16.51-2fixed
jessie (security)3.16.51-3+deb8u1fixed
stretch4.9.65-3fixed
stretch (security)4.9.65-3+deb9u2fixed
buster4.14.7-1fixed
sid4.14.13-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)4.7.2-1high
linuxsourcejessie3.16.39-1high
linuxsourcewheezy3.2.84-1highDLA-772-1

Notes

https://patchwork.kernel.org/patch/8752621/
Fixed by: https://git.kernel.org/linus/3aa02cb664c5fb1042958c8d1aa8c35055a2ebc4 (v4.7-rc1)
http://seclists.org/oss-sec/2016/q4/576

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