CVE-2026-121968
Netrek-client-cow through 3.3.3 Out-of-Bounds Read via SP_S_MESSAGE Packets
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-129 |
| Vendor | quozl |
| Product | netrek-client-cow |
| Published | Nov 4, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
quozl / netrek-client-cow
0 ≤ 3.3.3
References
github.com: https://github.com/quozl/netrek-client-cow/commit/fb322e74abee3b0b76a9c5a31df6aab5585d3127 github.com: https://github.com/quozl/netrek-client-cow github.com: https://github.com/quozl/netrek-client-cow/blob/3.3.3/short.c#L942-L943 vulncheck.com: https://www.vulncheck.com/advisories/netrek-client-cow-through-3.3.3-out-of-bounds-read-via-sp-s-message-packets
Credits
Deus Rex James Cameron