{"id":"USN-8852-1","summary":"openvpn vulnerabilities","details":"It was discovered that OpenVPN had a use-after-free vulnerability in\nits TLS session handling. An attacker could possibly use this issue\nto cause OpenVPN to crash, resulting in a denial of service, or\nexecute arbitrary code. (CVE-2026-84471)\n\nIt was discovered that OpenVPN incorrectly handled retransmissions of\nACK packet IDs, which could trigger a timeout integer overflow. A\nremote attacker could possibly use this issue to cause a denial of\nservice. (CVE-2026-84732)","modified":"2026-10-01T00:41:46.669897143Z","published":"2026-09-30T11:53:54Z","related":["UBUNTU-CVE-2026-84471","UBUNTU-CVE-2026-84732"],"upstream":["CVE-2026-84471","CVE-2026-84732","UBUNTU-CVE-2026-84471","UBUNTU-CVE-2026-84732"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8852-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-84471"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-84732"}],"affected":[{"package":{"name":"openvpn","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/openvpn?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.11-0ubuntu0.22.04.5"}]}],"versions":["2.5.1-3ubuntu1","2.5.1-3ubuntu2","2.5.1-3ubuntu4","2.5.1-3ubuntu5","2.5.5-1ubuntu1","2.5.5-1ubuntu3","2.5.5-1ubuntu3.1","2.5.9-0ubuntu0.22.04.2","2.5.9-0ubuntu0.22.04.3","2.5.11-0ubuntu0.22.04.1","2.5.11-0ubuntu0.22.04.3","2.5.11-0ubuntu0.22.04.4"],"ecosystem_specific":{"binaries":[{"binary_version":"2.5.11-0ubuntu0.22.04.5","binary_name":"openvpn"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8852-1.json","cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[{"id":"CVE-2026-84471","severity":[{"score":"medium","type":"Ubuntu"}]},{"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-84732"}]}}},{"package":{"name":"openvpn","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/openvpn?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.19-0ubuntu0.24.04.4"}]}],"versions":["2.6.5-0ubuntu1","2.6.7-1ubuntu1","2.6.9-1ubuntu2","2.6.9-1ubuntu3","2.6.9-1ubuntu4","2.6.9-1ubuntu4.1","2.6.12-0ubuntu0.24.04.1","2.6.12-0ubuntu0.24.04.3","2.6.14-0ubuntu0.24.04.1","2.6.14-0ubuntu0.24.04.2","2.6.14-0ubuntu0.24.04.3","2.6.19-0ubuntu0.24.04.1","2.6.19-0ubuntu0.24.04.2","2.6.19-0ubuntu0.24.04.3"],"ecosystem_specific":{"binaries":[{"binary_name":"openvpn","binary_version":"2.6.19-0ubuntu0.24.04.4"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:24.04:LTS","cves":[{"severity":[{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-84471"},{"id":"CVE-2026-84732","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8852-1.json"}},{"package":{"name":"openvpn","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/openvpn?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.0-1ubuntu1.3"}]}],"versions":["2.6.14-2ubuntu1","2.6.15-1ubuntu1","2.7.0~rc5-1ubuntu5","2.7.0~rc6-1ubuntu1","2.7.0-1ubuntu1","2.7.0-1ubuntu1.1","2.7.0-1ubuntu1.2"],"ecosystem_specific":{"binaries":[{"binary_version":"2.7.0-1ubuntu1.3","binary_name":"openvpn"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2026-84471","severity":[{"type":"Ubuntu","score":"medium"}]},{"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-84732"}],"ecosystem":"Ubuntu:26.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8852-1.json"}}],"schema_version":"1.9.0"}