# CVE-2026-74323: wifi: mt76: mt7996: Fix possible token leak in mt7996_tx_prepare_skb()

> A token leak in the mt7996 WiFi driver can lead to resource exhaustion and denial of service when link lookups fail.

- **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:** 15 Aug 2026
- **Updated:** 16 Oct 2026
- **Also known as:** BELL-CVE-2026-74323, DEBIAN-CVE-2026-74323, GHSA-34gf-qwwx-pv6w, UBUNTU-CVE-2026-74323

## What is CVE-2026-74323?

CVE-2026-74323 is a high-severity denial of service vulnerability in Linux, published on 15 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: mt76: mt7996: Fix possible token leak in mt7996_tx_prepare_skb()

If link_conf or link_sta lookup fails in mt7996_tx_prepare_skb routine,
mt7996 driver leaks an already allocated tx token. Fix the issue
releasing the token in case of error.

## Which versions are affected by CVE-2026-74323?


## How do I fix CVE-2026-74323?

Apply the vendor's patch.

## Is CVE-2026-74323 being exploited?

There is no known exploitation of CVE-2026-74323 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-74323 and fix it if it is affected.

What it is: CVE-2026-74323 is a high-severity denial of service vulnerability in Linux, published on 15 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-2026-74323 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-2026-74323/ (Markdown: https://insights.sbomify.com/CVE-2026-74323/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-74323
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-74323
- OSV: https://osv.dev/vulnerability/CVE-2026-74323

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-74323/
Summaries are generated and may contain mistakes; the official description above is the record.