GHSA-R63C-MG4X-3HRX
Vulnerability from github – Published: 2026-10-18 18:32 – Updated: 2026-10-30 15:33In 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.
{
"affected": [],
"aliases": [
"CVE-2026-98705"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-18T16:17:24Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: account proxy paths against the mesh path limit\n\nProxy-path churn can drive the interface path counter negative and let\nlater mesh path additions exceed MESH_MAX_MPATHS.\n\nmesh_path_free_rcu() decrements the interface mpaths counter for entries\nfrom both the mesh and proxy path tables, but mpp_path_add() never\nreserves a slot in that counter. Removing or expiring a proxy path\ntherefore returns a slot that was never charged.\n\nmesh_path_add() uses the same counter to enforce MESH_MAX_MPATHS, so once\nit falls below the number of installed paths the limit no longer holds.\n\nReserve the shared quota before allocating a proxy path and release it on\nevery unsuccessful addition. Mesh and proxy paths now share one\n1024-entry budget, so mpp_path_add() can return -ENOSPC at that limit.",
"id": "GHSA-r63c-mg4x-3hrx",
"modified": "2026-10-30T15:33:57Z",
"published": "2026-10-18T18:32:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98705"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0e79c9d260862bd4676955d3cac7baa0d38a5b2e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3b75831ceee76d32bb8e7ddd241904f92f9b5407"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5a32409ed34a1868830899a5d2437f0b3bf3532c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7f83dab0045f756a82a15ac751165aefa03bed11"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a5f35d4b112af1415ff06bd501c8cc26cc08aa8b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bfd447ee32f727e535e317aa5a8447488f943803"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c66ab4b94bb04c162485759196555e08c0965320"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/df072db65fdaa34ad15e1d66fc06a53e3e97f778"
}
],
"schema_version": "1.4.0",
"severity": []
}
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