CVE-2016-9794 Use after free in n/a
Local attackers can trigger a use-after-free in the ALSA subsystem via a crafted command, causing denial of service or potential code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-9794?
CVE-2016-9794 is a high-severity use after free vulnerability in Linux kernel, published on 28 Dec 2016. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2016-9794?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2016-9794?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2016-9794 being exploited?
There is no known exploitation of CVE-2016-9794 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2016-9794, GHSA-4x89-4xjg-wjv4, UBUNTU-CVE-2016-9794.