CVE-2023-52806 ALSA: hda: Fix possible null-ptr-deref when assigning a stream
A local attacker can trigger a null pointer dereference in the Linux kernel ALSA HDA driver, causing a system crash.
- 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-2023-52806?
CVE-2023-52806 is a medium-severity vulnerability in Linux kernel, published on 21 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
ALSA: hda: Fix possible null-ptr-deref when assigning a stream
While AudioDSP drivers assign streams exclusively of HOST or LINK type, nothing blocks a user to attempt to assign a COUPLED stream. As supplied substream instance may be a stub, what is the case when code-loading, such scenario ends with null-ptr-deref.
Weakness: CWE-476
Which versions are affected by CVE-2023-52806?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-52806?
Apply the vendor's patch.
Is CVE-2023-52806 being exploited?
There is no known exploitation of CVE-2023-52806 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2023-52806, DEBIAN-CVE-2023-52806, GHSA-5jjf-3vj6-wjxf, UBUNTU-CVE-2023-52806.