CVE-2026-98604

/// Technical description

In 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.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References