CVE-2026-64001

Technical Description

In the Linux kernel, the following vulnerability has been resolved:

ALSA: pcm: oss: Fix setup list UAF on proc write error

snd_pcm_oss_proc_write() links a newly allocated setup entry into the

OSS setup list before duplicating the task name. If the task-name

allocation fails, the error path frees the already linked entry and

leaves setup_list pointing at freed memory.

A later OSS device open can then walk the stale list entry in

snd_pcm_oss_look_for_setup() and dereference freed memory.

Allocate the task name and initialize the setup entry before publishing

the entry on setup_list. Also fetch the initial proc read iterator only

after taking setup_mutex, so all setup_list traversal follows the same

list lifetime rules.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References