CVE-2026-98603ovpn: replace bind when clearing stale local source

Official description

In the Linux kernel, the following vulnerability has been resolved: ovpn: replace bind when clearing stale local source The UDP output fallback clears bind->local in place when the remembered source address is no longer usable. The bind is RCU-published and read locklessly by concurrent TX, so an IPv6 reader can observe a torn address. Retry the route lookup with source address autoselection without modifying the bind. After a successful lookup, revalidate the bind and route key under peer->lock, reset the dst cache, and best-effort publish a replacement bind with a wildcard local address. Do not cache the resolved dst when clearing the local source. Replacing the source invalidates all per-CPU cache entries, while dst_cache_set_ip4 and dst_cache_set_ip6 update only the current CPU slot. The current packet can still use the resolved route; if bind allocation fails, a later cache miss retries the repair.

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/c44a04722f7dae9a45a101b8e100931ab59f1c18
• https://git.kernel.org/stable/c/72bd1bea37ea2c8553938f086bf48ccd2147dfe1
• https://git.kernel.org/stable/c/7d8104988f423572df1f3347ce578037b1043f34