{"id":"CVE-2026-98699","summary":"wifi: mac80211: fix mesh fast xmit path deletion UAF","details":"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.","modified":"2026-10-20T02:30:15.172632684Z","published":"2026-10-18T15:46:29.245Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98699.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/0117f1aa189495e6f1ff608681678817995aee39"},{"type":"WEB","url":"https://git.kernel.org/stable/c/128e800a41270ab197b1cc8043637a2924865608"},{"type":"WEB","url":"https://git.kernel.org/stable/c/93da3ec938bfdcfb3899428f04c6d0c56fe32952"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ee3aadc43ea69d98f666431e787137ac0badbb85"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98699.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98699"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d5edb9ae8d568745f893c5c5fa3837d85311b131"},{"fixed":"0117f1aa189495e6f1ff608681678817995aee39"},{"fixed":"128e800a41270ab197b1cc8043637a2924865608"},{"fixed":"93da3ec938bfdcfb3899428f04c6d0c56fe32952"},{"fixed":"ee3aadc43ea69d98f666431e787137ac0badbb85"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98699.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.4.0"},{"fixed":"6.12.113"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.56"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98699.json"}}],"schema_version":"1.9.0"}