CVE-2026-68346: ALSA: hda: cs35l41: validate and free ACPI mute object
In the Linux kernel, the following vulnerability has been resolved:
ALSA: hda: cs35l41: validate and free ACPI mute object
cs35l41getacpimutestate() 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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-68346?
The severity of CVE-2026-68346 is categorized as a high risk due to potential denial of service or system instability.
How does CVE-2026-68346 affect system security?
CVE-2026-68346 potentially compromises system stability by improperly handling ACPI mute object validations.
How do I fix CVE-2026-68346?
To fix CVE-2026-68346, update the Linux kernel to the latest version that includes the patches addressing this vulnerability.
Which versions of the Linux kernel are impacted by CVE-2026-68346?
CVE-2026-68346 affects specific versions of the Linux kernel prior to the issued patches, primarily those handling the ALSA subsystem.
What systems are at risk due to CVE-2026-68346?
Systems running the affected versions of the Linux kernel with ALSA and ACPI functionalities are at risk from CVE-2026-68346.