CVE intelligence

CVE-2026-80519

Vulnerability intelligence

Published Aug 26, 2026Sources checked Nov 3, 2026

9.8CRITICALCVSS out of 10

What this means

Review the available evidence

CVE-2026-80519 and is rated Critical severity with a CVSS score of 9.8. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

CISA KEVNot listedBased on the latest collected catalog

EPSS0.6%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-80519?

In the Linux kernel, the following vulnerability has been resolved:

ovpn: finish crypto callback cleanup before peer release

Crypto completion callbacks hold both key-slot and peer references. The peer reference pins the netdev, and dropping the last peer reference can let netdev unregistration and module removal make progress.

Do not release that peer reference before the callback has finished its own cleanup. If ovpn_crypto_key_slot_put runs after ovpn_peer_put, it can schedule an RCU callback backed by module text after ovpn_cleanup rcu_barrier has already run.

The TX error path also freed the remaining skb after ovpn_peer_put, leaving callback cleanup outside the peer/netdev lifetime window.

Release the key slot and free any remaining skb first, then drop the peer reference as the last callback action.

Source: NVD