{"id":"CVE-2026-79896","title":"Fortra BoKS Manager boks_portmux TLS ClientHello out-of-bounds read vulnerability","summary":"Fortra BoKS Manager contains an out-of-bounds read vulnerability in the custom TLS ClientHello parser used by boks_portmux. A remote unauthenticated attacker can submit a malformed ClientHello and terminate boks_portmux. Although the dae…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-125"],"vendor":"Fortra","product":"BoKS Manager","affected":["boks_manager >= 8.1.0.0 <= 8.1.0.23","boks_manager >= 9.0.0.0 <= 9.0.0.6"],"published":"2026-10-01","updated":"2026-10-01","sourceUpdated":"2026-10-01T15:09:21.099Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-79896","references":[{"url":"https://www.fortra.com/security/advisories/product-security/fi-2026-016"}],"tags":["cve.org"],"ingestedAt":"2026-10-01T15:48:17.894Z","slug":"CVE-2026-79896","body":"## Overview\n\nFortra BoKS Manager contains an out-of-bounds read vulnerability in the custom TLS ClientHello parser used by boks_portmux. A remote unauthenticated attacker can submit a malformed ClientHello and terminate boks_portmux. Although the daemon is normally restarted automatically, repeated requests can sustain the service interruption.\n\n## Affected\n\n- `boks_manager >= 8.1.0.0 <= 8.1.0.23`\n- `boks_manager >= 9.0.0.0 <= 9.0.0.6`\n\n## Remediation\n\nUpgrade to boks-server 8.1.0.24 or boks-server 9.0.0.7.\n\n### Workarounds\n\nUntil a fixed release is installed, restrict network access to boks_portmux listeners to trusted systems.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}