{"id":"CVE-2026-98603","state":"PUBLISHED","title":"ovpn: replace bind when clearing stale local source","description":"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 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.","publishedAt":"2026-10-18T15:19:16.215Z","updatedAt":"2026-10-19T09:22:30.537Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"08857b5ec5d91d83e69e40a36554a8c7557b7301","status":"affected","lessThan":"c44a04722f7dae9a45a101b8e100931ab59f1c18","versionType":"git"},{"version":"08857b5ec5d91d83e69e40a36554a8c7557b7301","status":"affected","lessThan":"72bd1bea37ea2c8553938f086bf48ccd2147dfe1","versionType":"git"},{"version":"08857b5ec5d91d83e69e40a36554a8c7557b7301","status":"affected","lessThan":"7d8104988f423572df1f3347ce578037b1043f34","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ovpn/udp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.16","versionType":"semver"},{"version":"6.18.55","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.9","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":["drivers/net/ovpn/udp.c"]}],"references":["https://git.kernel.org/stable/c/c44a04722f7dae9a45a101b8e100931ab59f1c18","https://git.kernel.org/stable/c/72bd1bea37ea2c8553938f086bf48ccd2147dfe1","https://git.kernel.org/stable/c/7d8104988f423572df1f3347ce578037b1043f34"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98603.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98603","state":"PUBLISHED","datePublished":"2026-10-18T15:19:16.215Z","dateUpdated":"2026-10-19T09:22:30.537Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.359Z"},"containers":{"cna":{"title":"ovpn: replace bind when clearing stale local source","descriptions":[{"lang":"en","value":"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 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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"08857b5ec5d91d83e69e40a36554a8c7557b7301","status":"affected","lessThan":"c44a04722f7dae9a45a101b8e100931ab59f1c18","versionType":"git"},{"version":"08857b5ec5d91d83e69e40a36554a8c7557b7301","status":"affected","lessThan":"72bd1bea37ea2c8553938f086bf48ccd2147dfe1","versionType":"git"},{"version":"08857b5ec5d91d83e69e40a36554a8c7557b7301","status":"affected","lessThan":"7d8104988f423572df1f3347ce578037b1043f34","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ovpn/udp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.16","versionType":"semver"},{"version":"6.18.55","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.9","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":["drivers/net/ovpn/udp.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:22:30.537Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"6.18.55"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"7.2.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}