{"id":"CVE-2026-98603","published":"2026-10-18T16:17:13.040","lastModified":"2026-10-19T10:19:22.037","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.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/72bd1bea37ea2c8553938f086bf48ccd2147dfe1","tags":[]},{"url":"https://git.kernel.org/stable/c/7d8104988f423572df1f3347ce578037b1043f34","tags":[]},{"url":"https://git.kernel.org/stable/c/c44a04722f7dae9a45a101b8e100931ab59f1c18","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}