ovpn: replace bind when clearing stale local source

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Summary

CVECVE-2026-98603
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-18 16:17:13 UTC
Updated2026-10-19 10:19:22 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 08857b5ec5d91d83e69e40a36554a8c7557b7301 c44a04722f7dae9a45a101b8e100931ab59f1c18 git Not specified
CNA Linux Linux affected 08857b5ec5d91d83e69e40a36554a8c7557b7301 72bd1bea37ea2c8553938f086bf48ccd2147dfe1 git Not specified
CNA Linux Linux affected 08857b5ec5d91d83e69e40a36554a8c7557b7301 7d8104988f423572df1f3347ce578037b1043f34 git Not specified
CNA Linux Linux affected 6.16 Not specified
CNA Linux Linux unaffected 6.16 semver Not specified
CNA Linux Linux unaffected 6.18.55 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.9 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/7d8104988f423572df1f3347ce578037b1043f34 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/72bd1bea37ea2c8553938f086bf48ccd2147dfe1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c44a04722f7dae9a45a101b8e100931ab59f1c18 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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