Bug 2567749 (CVE-2026-121968)

Summary: CVE-2026-121968 netrek-client-cow: netrek-client-cow: Denial of Service via crafted server messages
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in netrek-client-cow. An attacker controlling a server or intercepting network traffic can trigger an out-of-bounds read by sending a specially crafted message containing an invalid recipient index. This issue causes the client application to crash, resulting in a Denial of Service (DoS).
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Description OSIDB Bzimport 2026-11-05 22:23:07 UTC 
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 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.