What’s Vulnerable › Vulnerabilities

CVE-2026-46163: wifi: b43legacy: enforce bounds check on firmware key index in RX path

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-28 · updated 2026-10-15
• Weakness: CWE-129

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: b43legacy: enforce bounds check on firmware key index in RX path Same fix as b43: the firmware-controlled key index in b43legacy_rx() can exceed dev->max_nr_keys. The existing B43legacy_WARN_ON is non-enforcing in production builds, allowing an out-of-bounds read of dev->key[]. Make the check enforcing by dropping the frame for invalid indices.

Affected products

• Linux kernel: from 2.6.24 before 5.10.258; from 5.11 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.140; from 6.7 before 6.12.88; from 6.13 before 6.18.30 — fixed in 5.10.258, 5.15.209, 6.1.175, 6.12.88, 6.18.30, 6.6.140

How to fix

Upgrade to a fixed version: Linux kernel 5.10.258, 5.15.209, 6.1.175, 6.12.88. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1baaeb6adecb9691748c0253dab6ddd19a2b4e9e
• https://git.kernel.org/stable/c/4242db36de99de734cc1f60e5edd86cda7e598c6
• https://git.kernel.org/stable/c/6ee946077607d7783ae6709a899213fc4fe08f35
• https://git.kernel.org/stable/c/9d1bc155802943e92c57a5fb923d23edfbf0b525
• https://git.kernel.org/stable/c/a035766f970bde2d4298346a31a80685be5c0205
• https://git.kernel.org/stable/c/a92bd0503df2488f2cc040f329ebccff1c1934cb
• https://git.kernel.org/stable/c/df805c1d085b7a96077f0964185764c87060950d
• https://git.kernel.org/stable/c/fdd4e51979f42ca8b1ab7e6176b607e1caabf2a5
• https://cert-portal.siemens.com/productcert/html/ssa-784472.html

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