CVE-2026-68346 ALSA: hda: cs35l41: validate and free ACPI mute object
A memory corruption vulnerability in the Linux kernel's cs35l41 audio driver allows local attackers to cause a denial of service or potentially execute code via malformed ACPI responses.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-68346?
CVE-2026-68346 is a memory corruption vulnerability in Linux, published on 10 Aug 2026. 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: cs35l41: validate and free ACPI mute object
cs35l41_get_acpi_mute_state() evaluates a _DSM method to get the ACPI mute state and reads the first byte from the returned object.
However, the returned ACPI object is owned by the caller and is never freed after use, so each successful query leaks the _DSM result object.
The code also assumes that the returned object is a buffer with at least one byte. A malformed firmware response can return a different object type or an empty buffer, and the direct ret->buffer.pointer dereference can then access an invalid pointer.
Use the typed _DSM helper, validate that the returned buffer contains at least one byte, and free the ACPI object after reading it.
Which versions are affected by CVE-2026-68346?
How do I fix CVE-2026-68346?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-68346 being exploited?
There is no known exploitation of CVE-2026-68346 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68346, DEBIAN-CVE-2026-68346, GHSA-x7v3-rmxh-58mh, UBUNTU-CVE-2026-68346.