CVE-2016-9794

Name	CVE-2016-9794
Description	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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
References	DLA-772-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	buster	4.19.249-2	fixed
	buster (security)	4.19.269-1	fixed
	bullseye	5.10.158-2	fixed
	bullseye (security)	5.10.162-1	fixed
	bookworm	6.1.15-1	fixed
	sid	6.1.20-1	fixed

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

Package	Type	Release	Fixed Version	Origin
linux	source	wheezy	3.2.84-1	DLA-772-1
linux	source	jessie	3.16.39-1
linux	source	(unstable)	4.7.2-1

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