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

> A missing validation in the Linux kernel Wi-Fi subsystem allows a remote attacker to cause a denial of service by sending malformed TWT setup frames.

- **Severity:** High 8.8 (`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 28 Aug 2026
- **Updated:** 16 Oct 2026
- **Also known as:** AZL-98129, BELL-CVE-2026-80722, DEBIAN-CVE-2026-80722, GHSA-h7fr-f2m3-rhpf, UBUNTU-CVE-2026-80722

## What is CVE-2026-80722?

CVE-2026-80722 is a high-severity denial of service vulnerability in Linux, published on 28 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official 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]

## Which versions are affected by CVE-2026-80722?


## How do I fix CVE-2026-80722?

Apply the vendor's patch.

## Is CVE-2026-80722 being exploited?

There is no known exploitation of CVE-2026-80722 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-80722 and fix it if it is affected.

What it is: CVE-2026-80722 is a high-severity denial of service vulnerability in Linux, published on 28 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-80722 in the wild and no public exploit code.

Affected product: Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-80722/ (Markdown: https://insights.sbomify.com/CVE-2026-80722/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-80722
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-80722
- OSV: https://osv.dev/vulnerability/CVE-2026-80722

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-80722/
Summaries are generated and may contain mistakes; the official description above is the record.