{"id":"CVE-2026-98603","title":"ovpn: replace bind when clearing stale local source","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\novpn: replace bind when clearing stale local source\n\nThe UDP output fallback clears bind->local in place when the remembered\nsource address is no longer usable. The bin…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 08857b5ec5d91d83e69e40a36554a8c7557b7301 < c44a04722f7dae9a45a101b8e100931ab59f1c18","Linux >= 08857b5ec5d91d83e69e40a36554a8c7557b7301 < 72bd1bea37ea2c8553938f086bf48ccd2147dfe1","Linux >= 08857b5ec5d91d83e69e40a36554a8c7557b7301 < 7d8104988f423572df1f3347ce578037b1043f34","Linux 6.16"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:19:16.215Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98603","references":[{"url":"https://git.kernel.org/stable/c/c44a04722f7dae9a45a101b8e100931ab59f1c18"},{"url":"https://git.kernel.org/stable/c/72bd1bea37ea2c8553938f086bf48ccd2147dfe1"},{"url":"https://git.kernel.org/stable/c/7d8104988f423572df1f3347ce578037b1043f34"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T15:45:12.247Z","slug":"CVE-2026-98603","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\novpn: replace bind when clearing stale local source\n\nThe UDP output fallback clears bind->local in place when the remembered\nsource address is no longer usable. The bind is RCU-published and read\nlocklessly by concurrent TX, so an IPv6 reader can observe a torn\naddress.\n\nRetry the route lookup with source address autoselection without\nmodifying the bind. After a successful lookup, revalidate the bind and\nroute key under peer->lock, reset the dst cache, and best-effort publish\na replacement bind with a wildcard local address.\n\nDo not cache the resolved dst when clearing the local source. Replacing\nthe source invalidates all per-CPU cache entries, while\ndst_cache_set_ip4 and dst_cache_set_ip6 update only the current CPU\nslot. The current packet can still use the resolved route; if bind\nallocation fails, a later cache miss retries the repair.\n\n## Affected\n\n- `Linux >= 08857b5ec5d91d83e69e40a36554a8c7557b7301 < c44a04722f7dae9a45a101b8e100931ab59f1c18`\n- `Linux >= 08857b5ec5d91d83e69e40a36554a8c7557b7301 < 72bd1bea37ea2c8553938f086bf48ccd2147dfe1`\n- `Linux >= 08857b5ec5d91d83e69e40a36554a8c7557b7301 < 7d8104988f423572df1f3347ce578037b1043f34`\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":[]}