ovpn: replace bind when learning local endpoint

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98604
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 learning local endpoint struct ovpn_bind is published through peer->bind with RCU, but local endpoint learning updates bind->local in place under peer->lock. UDP TX reads the field without that lock. In particular, a concurrent IPv6 update can therefore result in a torn address read. Use ovpn_peer_reset_sockaddr to publish a replacement bind when learning a new local endpoint, just as a remote endpoint change does. Preserve the current remote address and reset the dst cache only after the new bind has been published successfully. Track remote endpoint changes separately so that float notification and transport-address rehashing remain limited to actual peer floats.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected f0281c1d3732d1ec084fa1e06d1767d33e1a570e 21dbc9f4d0bdd3b22f91beabc7840064bf11594f git Not specified
CNA Linux Linux affected f0281c1d3732d1ec084fa1e06d1767d33e1a570e e283009151d3d131447c2edda500199c5fda5f72 git Not specified
CNA Linux Linux affected f0281c1d3732d1ec084fa1e06d1767d33e1a570e aea934a221ec6a867221e5b765f65f1857befd53 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/e283009151d3d131447c2edda500199c5fda5f72 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/aea934a221ec6a867221e5b765f65f1857befd53 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/21dbc9f4d0bdd3b22f91beabc7840064bf11594f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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