{"id":"CVE-2026-98705","title":"wifi: mac80211: account proxy paths against the mesh path limit","summary":"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…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= ece1a2e7e86078c8379937b546e32cb7f25fcb6c < df072db65fdaa34ad15e1d66fc06a53e3e97f778","Linux >= ece1a2e7e86078c8379937b546e32cb7f25fcb6c < 3b75831ceee76d32bb8e7ddd241904f92f9b5407","Linux >= ece1a2e7e86078c8379937b546e32cb7f25fcb6c < 5a32409ed34a1868830899a5d2437f0b3bf3532c","Linux >= ece1a2e7e86078c8379937b546e32cb7f25fcb6c < a5f35d4b112af1415ff06bd501c8cc26cc08aa8b","Linux 3.2"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:46:35.520Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98705","references":[{"url":"https://git.kernel.org/stable/c/df072db65fdaa34ad15e1d66fc06a53e3e97f778"},{"url":"https://git.kernel.org/stable/c/3b75831ceee76d32bb8e7ddd241904f92f9b5407"},{"url":"https://git.kernel.org/stable/c/5a32409ed34a1868830899a5d2437f0b3bf3532c"},{"url":"https://git.kernel.org/stable/c/a5f35d4b112af1415ff06bd501c8cc26cc08aa8b"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T16:47:32.514Z","slug":"CVE-2026-98705","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= ece1a2e7e86078c8379937b546e32cb7f25fcb6c < df072db65fdaa34ad15e1d66fc06a53e3e97f778`\n- `Linux >= ece1a2e7e86078c8379937b546e32cb7f25fcb6c < 3b75831ceee76d32bb8e7ddd241904f92f9b5407`\n- `Linux >= ece1a2e7e86078c8379937b546e32cb7f25fcb6c < 5a32409ed34a1868830899a5d2437f0b3bf3532c`\n- `Linux >= ece1a2e7e86078c8379937b546e32cb7f25fcb6c < a5f35d4b112af1415ff06bd501c8cc26cc08aa8b`\n- `Linux 3.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}