{"id":"CVE-2026-98604","summary":"ovpn: replace bind when learning local endpoint","details":"In the Linux kernel, the following vulnerability has been resolved:\n\novpn: replace bind when learning local endpoint\n\nstruct ovpn_bind is published through peer-\u003ebind with RCU, but local\nendpoint learning updates bind-\u003elocal in place under peer-\u003elock. UDP TX\nreads the field without that lock. In particular, a concurrent IPv6\nupdate can therefore result in a torn address read.\n\nUse ovpn_peer_reset_sockaddr to publish a replacement bind when learning\na new local endpoint, just as a remote endpoint change does. Preserve\nthe current remote address and reset the dst cache only after the new\nbind has been published successfully.\n\nTrack remote endpoint changes separately so that float notification and\ntransport-address rehashing remain limited to actual peer floats.","modified":"2026-10-19T02:46:52.970637635Z","published":"2026-10-18T15:19:17.227Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98604.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/21dbc9f4d0bdd3b22f91beabc7840064bf11594f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/aea934a221ec6a867221e5b765f65f1857befd53"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e283009151d3d131447c2edda500199c5fda5f72"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98604.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98604"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f0281c1d3732d1ec084fa1e06d1767d33e1a570e"},{"fixed":"21dbc9f4d0bdd3b22f91beabc7840064bf11594f"},{"fixed":"e283009151d3d131447c2edda500199c5fda5f72"},{"fixed":"aea934a221ec6a867221e5b765f65f1857befd53"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98604.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.16.0"},{"fixed":"6.18.55"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98604.json"}}],"schema_version":"1.9.0"}