What’s Vulnerable › Vulnerabilities

CVE-2026-46122: wifi: b43: enforce bounds check on firmware key index in b43_rx()

• 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: b43: enforce bounds check on firmware key index in b43_rx() The firmware-controlled key index in b43_rx() can exceed the dev->key[] array size (58 entries). The existing B43_WARN_ON is non-enforcing in production builds, allowing an out-of-bounds read. Make the B43_WARN_ON check enforcing by dropping the frame when the firmware returns an invalid key index.

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/135cb49c9a42a02cceeac7b49ec03e267f7ed6d6
• https://git.kernel.org/stable/c/1e9e55cf66f0fa4799f4d86ef3aaba8e606b5c14
• https://git.kernel.org/stable/c/1f4f78bf8549e6ac4f04fba4176854f3a6e0c332
• https://git.kernel.org/stable/c/219ba67e69e49681e48c822d6eaafb5def032f34
• https://git.kernel.org/stable/c/3157ad40b084a8f3932da2641749ab45e99b933e
• https://git.kernel.org/stable/c/765709720e6af9a178abc40244a8d1aa39ac4e71
• https://git.kernel.org/stable/c/c3d7b90dc95020cd9282c4630e402fe224f7644e
• https://git.kernel.org/stable/c/d7029879bafdac2006c67553807d122283dc6cbf
• https://cert-portal.siemens.com/productcert/html/ssa-784472.html

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