It was discovered that OpenVPN had a use-after-free vulnerability in its TLS session handling. An attacker could possibly use this issue to cause OpenVPN to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2026-84471) It was discovered that OpenVPN incorrectly handled retransmissions of ACK packet IDs, which could trigger a timeout integer overflow.
USN-8852-1: OpenVPN vulnerabilities
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