{"id":"CVE-2026-98699","state":"PUBLISHED","title":"wifi: mac80211: fix mesh fast xmit path deletion UAF","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix mesh fast xmit path deletion UAF\n\nmesh_fast_tx_cache() stores raw mesh_path pointers. Path deletion\nflushes the cache and then frees the path with kfree_rcu(), but a\nlookup that already holds the path can insert a new cache entry\nafter the flush. The cache then points at freed memory.\n\nSet MESH_PATH_DELETED before flushing, and skip inserting a cache\nentry if the path or MPP path is already deleted. Check this under\nthe cache walk lock so it is ordered with the flush. Use WRITE_ONCE()\nfor the deletion flag updates because the cache check reads flags\nwithout taking state_lock.","publishedAt":"2026-10-18T15:46:29.245Z","updatedAt":"2026-10-21T12:55:49.005Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d5edb9ae8d568745f893c5c5fa3837d85311b131","status":"affected","lessThan":"ebb7cba623d38733d33d79a8c7442f5ea04c0fb0","versionType":"git"},{"version":"d5edb9ae8d568745f893c5c5fa3837d85311b131","status":"affected","lessThan":"0117f1aa189495e6f1ff608681678817995aee39","versionType":"git"},{"version":"d5edb9ae8d568745f893c5c5fa3837d85311b131","status":"affected","lessThan":"128e800a41270ab197b1cc8043637a2924865608","versionType":"git"},{"version":"d5edb9ae8d568745f893c5c5fa3837d85311b131","status":"affected","lessThan":"93da3ec938bfdcfb3899428f04c6d0c56fe32952","versionType":"git"},{"version":"d5edb9ae8d568745f893c5c5fa3837d85311b131","status":"affected","lessThan":"ee3aadc43ea69d98f666431e787137ac0badbb85","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":"6.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.4","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/ebb7cba623d38733d33d79a8c7442f5ea04c0fb0","https://git.kernel.org/stable/c/0117f1aa189495e6f1ff608681678817995aee39","https://git.kernel.org/stable/c/128e800a41270ab197b1cc8043637a2924865608","https://git.kernel.org/stable/c/93da3ec938bfdcfb3899428f04c6d0c56fe32952","https://git.kernel.org/stable/c/ee3aadc43ea69d98f666431e787137ac0badbb85"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98699.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98699","state":"PUBLISHED","datePublished":"2026-10-18T15:46:29.245Z","dateUpdated":"2026-10-21T12:55:49.005Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.365Z"},"containers":{"cna":{"title":"wifi: mac80211: fix mesh fast xmit path deletion UAF","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix mesh fast xmit path deletion UAF\n\nmesh_fast_tx_cache() stores raw mesh_path pointers. Path deletion\nflushes the cache and then frees the path with kfree_rcu(), but a\nlookup that already holds the path can insert a new cache entry\nafter the flush. The cache then points at freed memory.\n\nSet MESH_PATH_DELETED before flushing, and skip inserting a cache\nentry if the path or MPP path is already deleted. Check this under\nthe cache walk lock so it is ordered with the flush. Use WRITE_ONCE()\nfor the deletion flag updates because the cache check reads flags\nwithout taking state_lock."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d5edb9ae8d568745f893c5c5fa3837d85311b131","status":"affected","lessThan":"ebb7cba623d38733d33d79a8c7442f5ea04c0fb0","versionType":"git"},{"version":"d5edb9ae8d568745f893c5c5fa3837d85311b131","status":"affected","lessThan":"0117f1aa189495e6f1ff608681678817995aee39","versionType":"git"},{"version":"d5edb9ae8d568745f893c5c5fa3837d85311b131","status":"affected","lessThan":"128e800a41270ab197b1cc8043637a2924865608","versionType":"git"},{"version":"d5edb9ae8d568745f893c5c5fa3837d85311b131","status":"affected","lessThan":"93da3ec938bfdcfb3899428f04c6d0c56fe32952","versionType":"git"},{"version":"d5edb9ae8d568745f893c5c5fa3837d85311b131","status":"affected","lessThan":"ee3aadc43ea69d98f666431e787137ac0badbb85","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":"6.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.4","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/ebb7cba623d38733d33d79a8c7442f5ea04c0fb0"},{"url":"https://git.kernel.org/stable/c/0117f1aa189495e6f1ff608681678817995aee39"},{"url":"https://git.kernel.org/stable/c/128e800a41270ab197b1cc8043637a2924865608"},{"url":"https://git.kernel.org/stable/c/93da3ec938bfdcfb3899428f04c6d0c56fe32952"},{"url":"https://git.kernel.org/stable/c/ee3aadc43ea69d98f666431e787137ac0badbb85"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-21T12:55:49.005Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.18.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"7.2.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}