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CVE-2026-98891

Linux: wifi: mac80211: validate deauth frame length before reason access

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)No scoreNo FIRST EPSS score in this snapshot yet
Fixed in51092dc769f021e9634474e1bd5a561da477fbdbAlso 80d1a110e9096b5bf41497f6b151154084862385, 7a5ef1fd654d0e90d59aa32c881789c8bcc4125a and 8 moreCVE List
Published23 Oct 2026Updated 23 Oct 2026CVE List

What fixes it

  • 51092dc769f021e9634474e1bd5a561da477fbdbLinuxCVE List
  • 80d1a110e9096b5bf41497f6b151154084862385LinuxCVE List
  • 7a5ef1fd654d0e90d59aa32c881789c8bcc4125aLinuxCVE List
  • 9df64ad43e1f2c036667bba2bf385e9d7b3af564LinuxCVE List
  • 4a360c6e18dfa9d70006c7247a6a8cc8dfe0d60fLinuxCVE List
  • 5.10.271LinuxCVE List
Show all 11 fixed versions

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: validate deauth frame length before reason access

ieee80211_rx_mgmt_deauth() reads the deauth reason code before checking that the fixed field is actually present in the received frame.

Validate the deauth frame length first and only then read the reason code.

Text from CVE List

Affected versions 20

  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 51092dc769f021e9634474e1bd5a561da477fbdbCVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before a6ed4c00ccdc15011a73daa2b38af9fc5a2c543eCVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 80d1a110e9096b5bf41497f6b151154084862385CVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before a78689e2beed200d4590318612c74ae25c9408cfCVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 7a5ef1fd654d0e90d59aa32c881789c8bcc4125aCVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 9df64ad43e1f2c036667bba2bf385e9d7b3af564CVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 4a360c6e18dfa9d70006c7247a6a8cc8dfe0d60fCVE List
  • Linuxaffected: all versions before 5.10.271CVE List
  • Linuxaffected: all versions before 5.15.222CVE List
  • Linuxaffected: all versions before 6.1.189CVE List
  • Linuxaffected: all versions before 6.6.158CVE List
  • Linuxaffected: all versions before 6.12.111CVE List
  • Linuxaffected: all versions before 6.18.53CVE List
  • Linuxunaffected: 5.10.271 through 5.10.*CVE List
  • Linuxunaffected: 5.15.222 through 5.15.*CVE List
  • Linuxunaffected: 6.1.189 through 6.1.*CVE List
  • Linuxunaffected: 6.6.158 through 6.6.*CVE List
  • Linuxunaffected: 6.12.111 through 6.12.*CVE List
  • Linuxunaffected: 6.18.53 through 6.18.*CVE List
  • Linuxunaffected: 7.2CVE List

References 7