{"id":"CVE-2026-88964","aliases":["DEBIAN-CVE-2026-88964","EUVD-2026-100755","GHSA-wm7f-2ghj-7r8c","UBUNTU-CVE-2026-88964"],"status":"published","title":"An integer underflow in OpenVPN version 2.7_alpha3 through 2.7.7 on Windows and Android allows...","description":"An integer underflow in OpenVPN version 2.7_alpha3 through 2.7.7 on Windows and Android allows remote authenticated servers to cause a denial of service or memory disclosure via crafted domain search options","severity":{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00378,"percentile":0.32034,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-125","CWE-191"],"published":"2026-10-08T00:00:00Z","modified":"2026-10-17T13:01:16Z","fixes":[{"ecosystem":"Debian:14","package":"openvpn","fixed_in":["2.7.8-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.6.11-1","2.6.12-1","2.6.13-1","2.6.14-0+deb12u1","2.6.14-0+deb12u2","2.6.14-1","2.6.14-2","2.6.15-1","2.6.3-1","2.6.3-1+deb12u1","2.6.3-1+deb12u1~bpo11+1","2.6.3-1+deb12u2","2.6.3-1+deb12u2~bpo11+1","2.6.3-1+deb12u3","2.6.3-1+deb12u4","2.6.3-2","2.6.3-2.1","2.6.7-1","2.6.9-1","2.7.0-1","2.7.0-1~bpo13+1","2.7.0~alpha1-1","2.7.0~alpha2-1","2.7.0~alpha3-1","2.7.0~beta1-1","2.7.0~beta2-1","2.7.0~beta3-1","2.7.0~rc1-1","2.7.0~rc2-1","2.7.0~rc2-2","2.7.0~rc3-1","2.7.0~rc4-1","2.7.0~rc5-1","2.7.0~rc6-1","2.7.1-1","2.7.1-1~bpo13+1","2.7.2-1","2.7.2-1~bpo13+1","2.7.3-1","2.7.5-1","2.7.5-1~bpo13+1","2.7.7-1","2.7.7-1~bpo13+1","2.7.8-1","2.7.8-1~bpo13+1"]},{"source":"osv","ecosystem":"Debian:13","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.6.14-1","2.6.14-1+deb13u1","2.6.14-1+deb13u2","2.6.14-1+deb13u3","2.6.14-2","2.6.15-1","2.7.0-1","2.7.0-1~bpo13+1","2.7.0~alpha1-1","2.7.0~alpha2-1","2.7.0~alpha3-1","2.7.0~beta1-1","2.7.0~beta2-1","2.7.0~beta3-1","2.7.0~rc1-1","2.7.0~rc2-1","2.7.0~rc2-2","2.7.0~rc3-1","2.7.0~rc4-1","2.7.0~rc5-1","2.7.0~rc6-1","2.7.1-1","2.7.1-1~bpo13+1","2.7.2-1","2.7.2-1~bpo13+1","2.7.3-1","2.7.5-1","2.7.5-1~bpo13+1","2.7.7-1","2.7.7-1~bpo13+1","2.7.8-1","2.7.8-1~bpo13+1"]},{"source":"osv","ecosystem":"Debian:14","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.8-1"}]}],"versions":["2.6.14-1","2.6.14-2","2.6.15-1","2.7.0-1","2.7.0-1~bpo13+1","2.7.0~alpha1-1","2.7.0~alpha2-1","2.7.0~alpha3-1","2.7.0~beta1-1","2.7.0~beta2-1","2.7.0~beta3-1","2.7.0~rc1-1","2.7.0~rc2-1","2.7.0~rc2-2","2.7.0~rc3-1","2.7.0~rc4-1","2.7.0~rc5-1","2.7.0~rc6-1","2.7.1-1","2.7.1-1~bpo13+1","2.7.2-1","2.7.2-1~bpo13+1","2.7.3-1","2.7.5-1","2.7.5-1~bpo13+1","2.7.7-1","2.7.7-1~bpo13+1","2.7.8-1~bpo13+1"]}],"products":[{"vendor":"openvpn","product":"openvpn"}],"references":[{"url":"https://community.openvpn.net/Security%20Announcements/CVE-2026-88964","tags":["vendor-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88964"},{"url":"https://github.com/advisories/GHSA-wm7f-2ghj-7r8c"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-88964","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-88964","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-88964","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-88964","description":"An 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