What is CVE-2026-98421?

CVE-2026-98421 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 3.17 onward and patched in 6.1.189, 6.6.158, 6.12.112 and others. CVE-2026-98421 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-98421?

CVE-2026-98421 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-98421?

Yes, CVE-2026-98421 has been patched. Fixed versions include 6.1.189, 6.6.158, 6.12.112 and others. If you are running Linux kernel 3.17 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-98421 actively exploited?

CVE-2026-98421 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-98421

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.

Package Linux Kernel

Published 2026-10-14

Last modified 2026-10-14

Patch available

Yes

Affected versions

Linux kernel versions 3.17 and later are affected. Fixed in 6.1.189, 6.6.158, 6.12.112, 6.18.54, 7.2.8, 7.3-rc4 and their respective stable series.

Affected from

≥ 3.17

Fixed in

✓ 6.1.189 6.1.x ✓ 6.6.158 6.6.x ✓ 6.12.112 6.12.x ✓ 6.18.54 6.18.x ✓ 7.2.8 7.2.x ✓ 7.3-rc4

References

6 total

Showing 5 of 6 references View all on NVD

Frequently asked questions

What is CVE-2026-98421?

CVE-2026-98421 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.17 onward and has been patched in 6.1.189, 6.6.158, 6.12.112 and others. CVE-2026-98421 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-98421?

Yes. CVE-2026-98421 has been patched. Fixed versions include 6.1.189, 6.6.158, 6.12.112 and others. If you are running Linux kernel 3.17 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-98421 actively exploited?

No. CVE-2026-98421 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.