What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-04-01 · updated 2026-06-17
• Weakness: CWE-125

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.

Affected products

• Linux kernel: from 5.2 before 5.4.291; from 5.5 before 5.10.235; from 5.11 before 5.15.179; from 5.16 before 6.1.131; from 6.2 before 6.6.83; from 6.7 before 6.12.19 — fixed in 5.10.235, 5.15.179, 5.4.291, 6.1.131, 6.12.19, 6.13.7

How to fix

Upgrade to a fixed version: Linux kernel 5.10.235, 5.15.179, 5.4.291, 6.1.131. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/38f0d398b6d7640d223db69df022c4a232f24774
• https://git.kernel.org/stable/c/47616b82f2d42ea2060334746fed9a2988d845c9
• https://git.kernel.org/stable/c/59cdda202829d1d6a095d233386870a59aff986f
• https://git.kernel.org/stable/c/88ed69f924638c7503644e1f8eed1e976f3ffa7a
• https://git.kernel.org/stable/c/b02f8d5a71c8571ccf77f285737c566db73ef5e5
• https://git.kernel.org/stable/c/c0e626f2b2390472afac52dfe72b29daf9ed8e1d
• https://git.kernel.org/stable/c/e0dc2c1bef722cbf16ae557690861e5f91208129
• https://git.kernel.org/stable/c/f265e6031d0bc4fc40c4619cb42466722b46eaa9
• https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
• https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html

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