{"id":"CVE-2026-98604","title":"ovpn: replace bind when learning local endpoint","summary":"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->bind with RCU, but local\nendpoint learning updates bind->local in place und…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= f0281c1d3732d1ec084fa1e06d1767d33e1a570e < 21dbc9f4d0bdd3b22f91beabc7840064bf11594f","Linux >= f0281c1d3732d1ec084fa1e06d1767d33e1a570e < e283009151d3d131447c2edda500199c5fda5f72","Linux >= f0281c1d3732d1ec084fa1e06d1767d33e1a570e < aea934a221ec6a867221e5b765f65f1857befd53","Linux 6.16"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:19:17.227Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98604","references":[{"url":"https://git.kernel.org/stable/c/21dbc9f4d0bdd3b22f91beabc7840064bf11594f"},{"url":"https://git.kernel.org/stable/c/e283009151d3d131447c2edda500199c5fda5f72"},{"url":"https://git.kernel.org/stable/c/aea934a221ec6a867221e5b765f65f1857befd53"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T15:45:12.247Z","slug":"CVE-2026-98604","body":"## Overview\n\nIn 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->bind with RCU, but local\nendpoint learning updates bind->local in place under peer->lock. 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.\n\n## Affected\n\n- `Linux >= f0281c1d3732d1ec084fa1e06d1767d33e1a570e < 21dbc9f4d0bdd3b22f91beabc7840064bf11594f`\n- `Linux >= f0281c1d3732d1ec084fa1e06d1767d33e1a570e < e283009151d3d131447c2edda500199c5fda5f72`\n- `Linux >= f0281c1d3732d1ec084fa1e06d1767d33e1a570e < aea934a221ec6a867221e5b765f65f1857befd53`\n- `Linux 6.16`\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":[]}