Vulnerability · CVE-2026-98421

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

Published Oct 14, 2026 · corrected/updated Oct 17, 2026 · Linux Linux Kernel · evidence confidence high

From: Greg Kroah-Hartman 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. The Linux kernel CVE t

Grounded briefings

Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.

Executive

CVE-2026-98421 is a high public vulnerability record for Linux Linux Kernel. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.

System administrator

Identify whether Linux Linux Kernel is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: linux (0 → 6.1.190-1); linux (0 → 6.12.113-1); linux (0 → 7.2.8-1); kernel. Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.

Security analyst

Signals on file: EPSS 0.2%. It is not currently listed in the CISA Known Exploited catalog. Sources contributing to this record: cve_org, epss, linux_kernel, osv. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.

Exploitation and remediation

Exploitation evidence
Not listed as known exploited in CISA KEV. Not in CISA KEV or VulnCheck KEV.
Patch and remediation
No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.
Safe detection guidance
Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.

Technology hubs

Debian

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

Oct 14, 2026 · Tenable CVE Database
Detected
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 i
Oct 17, 2026 · OpenSSF OSV / OSV Scanner
Fix available
linux fixed in 6.1.190-1; linux fixed in 6.12.113-1; linux fixed in 7.2.8-1
Oct 17, 2026 · OpenSSF OSV / OSV Scanner
Fix available
linux fixed in 6.1.190-1
Oct 17, 2026 · OpenSSF OSV / OSV Scanner
Fix available
linux fixed in 6.12.113-1
Oct 17, 2026 · OpenSSF OSV / OSV Scanner
Fix available
linux fixed in 7.2.8-1
Oct 17, 2026 · OpenSSF OSV / OSV Scanner
Updated
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 i

Affected

Debian:12 linux0 → 6.1.190-1
Debian:13 linux0 → 6.12.113-1
Debian:14 linux0 → 7.2.8-1
linux kernelversion unspecified

Sources

CVE.orgVulnerability recordCVE-2026-98421
Official CVE identifier
cve.org
FIRST EPSSExploitation probabilityCVE-2026-98421
30-day exploitation probability 0.2%
first.org
Linux Kernel CVEVendor advisoryCVE-2026-98421
From: Greg Kroah-Hartman 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 w
git.kernel.org
OpenSSF OSV / OSV ScannerPackage advisoryDEBIAN-CVE-2026-98421
osv.dev
Tenable CVE DatabaseVulnerability recordCVE-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 i
tenable.com

References

ADVISORY · security-tracker.debian.org