{"id":"CVE-2026-98705","state":"PUBLISHED","title":"wifi: mac80211: account proxy paths against the mesh path limit","description":"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.","publishedAt":"2026-10-18T15:46:35.520Z","updatedAt":"2026-10-21T12:55:53.953Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ece1a2e7e86078c8379937b546e32cb7f25fcb6c","status":"affected","lessThan":"c66ab4b94bb04c162485759196555e08c0965320","versionType":"git"},{"version":"ece1a2e7e86078c8379937b546e32cb7f25fcb6c","status":"affected","lessThan":"df072db65fdaa34ad15e1d66fc06a53e3e97f778","versionType":"git"},{"version":"ece1a2e7e86078c8379937b546e32cb7f25fcb6c","status":"affected","lessThan":"3b75831ceee76d32bb8e7ddd241904f92f9b5407","versionType":"git"},{"version":"ece1a2e7e86078c8379937b546e32cb7f25fcb6c","status":"affected","lessThan":"5a32409ed34a1868830899a5d2437f0b3bf3532c","versionType":"git"},{"version":"ece1a2e7e86078c8379937b546e32cb7f25fcb6c","status":"affected","lessThan":"a5f35d4b112af1415ff06bd501c8cc26cc08aa8b","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/mesh_pathtbl.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.2","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/mesh_pathtbl.c"]}],"references":["https://git.kernel.org/stable/c/c66ab4b94bb04c162485759196555e08c0965320","https://git.kernel.org/stable/c/df072db65fdaa34ad15e1d66fc06a53e3e97f778","https://git.kernel.org/stable/c/3b75831ceee76d32bb8e7ddd241904f92f9b5407","https://git.kernel.org/stable/c/5a32409ed34a1868830899a5d2437f0b3bf3532c","https://git.kernel.org/stable/c/a5f35d4b112af1415ff06bd501c8cc26cc08aa8b"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98705.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98705","state":"PUBLISHED","datePublished":"2026-10-18T15:46:35.520Z","dateUpdated":"2026-10-21T12:55:53.953Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.365Z"},"containers":{"cna":{"title":"wifi: mac80211: account proxy paths against the mesh path limit","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ece1a2e7e86078c8379937b546e32cb7f25fcb6c","status":"affected","lessThan":"c66ab4b94bb04c162485759196555e08c0965320","versionType":"git"},{"version":"ece1a2e7e86078c8379937b546e32cb7f25fcb6c","status":"affected","lessThan":"df072db65fdaa34ad15e1d66fc06a53e3e97f778","versionType":"git"},{"version":"ece1a2e7e86078c8379937b546e32cb7f25fcb6c","status":"affected","lessThan":"3b75831ceee76d32bb8e7ddd241904f92f9b5407","versionType":"git"},{"version":"ece1a2e7e86078c8379937b546e32cb7f25fcb6c","status":"affected","lessThan":"5a32409ed34a1868830899a5d2437f0b3bf3532c","versionType":"git"},{"version":"ece1a2e7e86078c8379937b546e32cb7f25fcb6c","status":"affected","lessThan":"a5f35d4b112af1415ff06bd501c8cc26cc08aa8b","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/mesh_pathtbl.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.2","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/mesh_pathtbl.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c66ab4b94bb04c162485759196555e08c0965320"},{"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-21T12:55:53.953Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.18.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"7.2.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}