All vulnerabilities
CVE-2026-98705

Linux: wifi: mac80211: account proxy paths against the mesh path limit

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)0.20%Chance of exploitation activity in the next 30 days, higher than 9% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in3b75831ceee76d32bb8e7ddd241904f92f9b5407Also 5a32409ed34a1868830899a5d2437f0b3bf3532cCVE List
Published18 Oct 2026Updated 21 Oct 2026CVE List

What fixes it

  • 3b75831ceee76d32bb8e7ddd241904f92f9b5407LinuxCVE List
  • 5a32409ed34a1868830899a5d2437f0b3bf3532cLinuxCVE 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: account proxy paths against the mesh path limit

Proxy-path churn can drive the interface path counter negative and let later mesh path additions exceed MESH_MAX_MPATHS.

mesh_path_free_rcu() decrements the interface mpaths counter for entries from both the mesh and proxy path tables, but mpp_path_add() never reserves a slot in that counter. Removing or expiring a proxy path therefore returns a slot that was never charged.

mesh_path_add() uses the same counter to enforce MESH_MAX_MPATHS, so once it falls below the number of installed paths the limit no longer holds.

Reserve the shared quota before allocating a proxy path and release it on every unsuccessful addition. Mesh and proxy paths now share one 1024-entry budget, so mpp_path_add() can return -ENOSPC at that limit.

Text from CVE List

Affected versions 12

  • Linuxaffected: ece1a2e7e86078c8379937b546e32cb7f25fcb6c before c66ab4b94bb04c162485759196555e08c0965320CVE List
  • Linuxaffected: ece1a2e7e86078c8379937b546e32cb7f25fcb6c before df072db65fdaa34ad15e1d66fc06a53e3e97f778CVE List
  • Linuxaffected: ece1a2e7e86078c8379937b546e32cb7f25fcb6c before 3b75831ceee76d32bb8e7ddd241904f92f9b5407CVE List
  • Linuxaffected: ece1a2e7e86078c8379937b546e32cb7f25fcb6c before 5a32409ed34a1868830899a5d2437f0b3bf3532cCVE List
  • Linuxaffected: ece1a2e7e86078c8379937b546e32cb7f25fcb6c before a5f35d4b112af1415ff06bd501c8cc26cc08aa8bCVE List
  • Linuxaffected: 3.2CVE List
  • Linuxunaffected: all versions before 3.2CVE List
  • Linuxunaffected: 6.6.160 through 6.6.*CVE List
  • Linuxunaffected: 6.12.113 through 6.12.*CVE List
  • Linuxunaffected: 6.18.56 through 6.18.*CVE List
  • Linuxunaffected: 7.2.10 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 5