{"id":"CVE-2026-121968","title":"Netrek-client-cow through 3.3.3 Out-of-Bounds Read via SP_S_MESSAGE Packets","summary":"Netrek-client-cow through 3.3.3 contains an out-of-bounds read vulnerability in short.c handleSMessage() that allows malicious servers to crash clients via an unchecked m_recpt index. Attackers controlling a Netrek server or intercepting…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-129"],"vendor":"quozl","product":"netrek-client-cow","affected":["netrek-client-cow <= 3.3.3"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T19:25:50.942563Z"},"published":"2026-11-04","updated":"2026-11-05","sourceUpdated":"2026-11-05T19:26:30.000Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-121968","references":[{"url":"https://github.com/quozl/netrek-client-cow/commit/fb322e74abee3b0b76a9c5a31df6aab5585d3127","label":"Patch Commit"},{"url":"https://github.com/quozl/netrek-client-cow"},{"url":"https://github.com/quozl/netrek-client-cow/blob/3.3.3/short.c#L942-L943"},{"url":"https://www.vulncheck.com/advisories/netrek-client-cow-through-3.3.3-out-of-bounds-read-via-sp-s-message-packets","label":"VulnCheck Advisory: Netrek-client-cow through 3.3.3 Out-of-Bounds Read via SP_S_MESSAGE Packets"}],"tags":["cve.org"],"epss":0.00325,"epssPercentile":0.25734,"ingestedAt":"2026-11-05T22:38:31.546Z","slug":"CVE-2026-121968","body":"## Overview\n\nNetrek-client-cow through 3.3.3 contains an out-of-bounds read vulnerability in short.c handleSMessage() that allows malicious servers to crash clients via an unchecked m_recpt index. Attackers controlling a Netrek server or intercepting the plaintext TCP connection can send SP_S_MESSAGE packets with m_recpt of 36 or more, reading past players[] and shipnos to deny service.\n\n## Affected\n\n- `netrek-client-cow <= 3.3.3`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}