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CVE-2026-98421

Linux: wifi: mac80211: require a peer station for TDLS setup confirm

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.21%Chance of exploitation activity in the next 30 days, higher than 11% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in6bae6ef511a29ef12ab969adeea691067d4d5d74Also 742c762bee59c973684f70dfed7de4945d3141e2, 1c0a5c96473b9e7a5f4c453ef6a13dc0f5589a4b and 1 moreCVE List
Published14 Oct 2026Updated 19 Oct 2026CVE List

What fixes it

  • 6bae6ef511a29ef12ab969adeea691067d4d5d74LinuxCVE List
  • 742c762bee59c973684f70dfed7de4945d3141e2LinuxCVE List
  • 1c0a5c96473b9e7a5f4c453ef6a13dc0f5589a4bLinuxCVE List
  • 038e1d126304fd25d507fd4e671232df57bd1799LinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 14

  • Linuxaffected: 6f7eaa47e1de30159277f91f1145a6687f13ffd9 before 6bae6ef511a29ef12ab969adeea691067d4d5d74CVE List
  • Linuxaffected: 6f7eaa47e1de30159277f91f1145a6687f13ffd9 before d0afa5395c46d73ad2090aa50209886e84f179bdCVE List
  • Linuxaffected: 6f7eaa47e1de30159277f91f1145a6687f13ffd9 before 742c762bee59c973684f70dfed7de4945d3141e2CVE List
  • Linuxaffected: 6f7eaa47e1de30159277f91f1145a6687f13ffd9 before fce36d242a18ddf64731d816a37564103172da11CVE List
  • Linuxaffected: 6f7eaa47e1de30159277f91f1145a6687f13ffd9 before 1c0a5c96473b9e7a5f4c453ef6a13dc0f5589a4bCVE List
  • Linuxaffected: 6f7eaa47e1de30159277f91f1145a6687f13ffd9 before 038e1d126304fd25d507fd4e671232df57bd1799CVE List
  • Linuxaffected: 3.17CVE List
  • Linuxunaffected: all versions before 3.17CVE List
  • Linuxunaffected: 6.1.189 through 6.1.*CVE List
  • Linuxunaffected: 6.6.158 through 6.6.*CVE List
  • Linuxunaffected: 6.12.112 through 6.12.*CVE List
  • Linuxunaffected: 6.18.54 through 6.18.*CVE List
  • Linuxunaffected: 7.2.8 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 6