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Ubuntu Security NoticesUSN-8852-1

USN-8852-1: OpenVPN vulnerabilities

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. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2026-84732)

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Scope

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  1. Published by Ubuntu

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  2. Added to SecurityAlert

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Vulnerabilities

CVEs named in this advisory

CVE-2026-84471View CVSS, KEV, EPSS, and threat contextCVE-2026-84732View CVSS, KEV, EPSS, and threat context
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