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.
Affected products
linux: linux kernel
References5
- git.kernel.org/stable/c/4cc54bdd54b337e77115be5b55577d1c58608eae Patch
- git.kernel.org/stable/c/8be4efd0dc0093eb7a02ad1aac936bca2a1f04ce Patch
- git.kernel.org/stable/c/be387230dc22d870afd0e5d35912b07c2bc323bd Patch
- git.kernel.org/stable/c/e13922bb97b4e6f94f8ac02d034f2d4bd65eeb3c Patch
- git.kernel.org/stable/c/d9df965284abde27ba6bfbdfc8407697cf6802f1
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 3 · as of 14 November 2026
- CWE
- CWE-416
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