CVE-2026-98705

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

State: Published
Severity: Not scored
Published: Oct 18, 2026
Updated: Oct 30, 2026
Reserved: Sep 25, 2026

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	ece1a2e7e86078c8379937b546e32cb7f25fcb6c to before 0e79c9d260862bd4676955d3cac7baa0d38a5b2eAffected ece1a2e7e86078c8379937b546e32cb7f25fcb6c to before bfd447ee32f727e535e317aa5a8447488f943803Affected ece1a2e7e86078c8379937b546e32cb7f25fcb6c to before 7f83dab0045f756a82a15ac751165aefa03bed11Affected ece1a2e7e86078c8379937b546e32cb7f25fcb6c to before c66ab4b94bb04c162485759196555e08c0965320Affected ece1a2e7e86078c8379937b546e32cb7f25fcb6c to before df072db65fdaa34ad15e1d66fc06a53e3e97f778Affected ece1a2e7e86078c8379937b546e32cb7f25fcb6c to before 3b75831ceee76d32bb8e7ddd241904f92f9b5407Affected ece1a2e7e86078c8379937b546e32cb7f25fcb6c to before 5a32409ed34a1868830899a5d2437f0b3bf3532cAffected ece1a2e7e86078c8379937b546e32cb7f25fcb6c to before a5f35d4b112af1415ff06bd501c8cc26cc08aa8bAffected
LinuxLinux	3.2Affected before 3.2Not affected 5.10.273 through 5.10.Not affected 5.15.224 through 5.15.Not affected 6.1.191 through 6.1.Not affected 6.6.160 through 6.6.Not affected 6.12.113 through 6.12.Not affected 6.18.56 through 6.18.Not affected 7.2.10 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

ece1a2e7e86078c8379937b546e32cb7f25fcb6c to before 0e79c9d260862bd4676955d3cac7baa0d38a5b2eAffected
ece1a2e7e86078c8379937b546e32cb7f25fcb6c to before bfd447ee32f727e535e317aa5a8447488f943803Affected
ece1a2e7e86078c8379937b546e32cb7f25fcb6c to before 7f83dab0045f756a82a15ac751165aefa03bed11Affected
ece1a2e7e86078c8379937b546e32cb7f25fcb6c to before c66ab4b94bb04c162485759196555e08c0965320Affected
ece1a2e7e86078c8379937b546e32cb7f25fcb6c to before df072db65fdaa34ad15e1d66fc06a53e3e97f778Affected
ece1a2e7e86078c8379937b546e32cb7f25fcb6c to before 3b75831ceee76d32bb8e7ddd241904f92f9b5407Affected
ece1a2e7e86078c8379937b546e32cb7f25fcb6c to before 5a32409ed34a1868830899a5d2437f0b3bf3532cAffected
ece1a2e7e86078c8379937b546e32cb7f25fcb6c to before a5f35d4b112af1415ff06bd501c8cc26cc08aa8bAffected

LinuxLinux

3.2Affected
before 3.2Not affected
5.10.273 through 5.10.*Not affected
5.15.224 through 5.15.*Not affected
6.1.191 through 6.1.*Not affected
6.6.160 through 6.6.*Not affected
6.12.113 through 6.12.*Not affected
6.18.56 through 6.18.*Not affected
7.2.10 through 7.2.*Not affected
7.3 and laterNot affected

References

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