# CVE-2026-98822: wifi: mac80211: prevent AP VLAN tx from other interfaces

> A flaw in Linux kernel mac80211 allows unicast frames sent on one interface to be incorrectly transmitted to stations on other VLANs of the same BSS.

- **Severity:** Not scored
- **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:** 18 Oct 2026
- **Updated:** 21 Oct 2026
- **Also known as:** AZL-108993, BELL-CVE-2026-98822, DEBIAN-CVE-2026-98822, GHSA-qq49-42v2-78c9, UBUNTU-CVE-2026-98822

## What is CVE-2026-98822?

CVE-2026-98822 is a missing authorization vulnerability in Linux, published on 18 Oct 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: prevent AP VLAN tx from other interfaces

Since the station lookup was factored out of ieee80211_build_hdr(),
ieee80211_lookup_ra_sta() uses sta_info_get_bss() for all AP and AP VLAN
frames, not only for control port frames. A unicast frame sent on one
interface thus matches a station of a different VLAN of the same BSS and
is transmitted to it.

Only match stations of the interface the frame is sent on, except for
control port frames, since those may be sent for VLAN stations directly
on the BSS interface.

## Which versions are affected by CVE-2026-98822?


## How do I fix CVE-2026-98822?

Apply the vendor's patch.

## Is CVE-2026-98822 being exploited?

There is no known exploitation of CVE-2026-98822 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-98822 and fix it if it is affected.

What it is: CVE-2026-98822 is a missing authorization vulnerability in Linux, published on 18 Oct 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-2026-98822 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-2026-98822/ (Markdown: https://insights.sbomify.com/CVE-2026-98822/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-98822
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-98822
- OSV: https://osv.dev/vulnerability/CVE-2026-98822

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-98822/
Summaries are generated and may contain mistakes; the official description above is the record.