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CVE-2026-121968Netrek-client-cow through 3.3.3 Out-of-Bounds Read via SP_S_MESSAGE Packets
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.
7.1 HIGHEPSS 0.32%Not in KEVNVD: Received
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 7.1 | HIGH | 4.0VulnCheck (CNA) | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| 6.5 | MEDIUM | 3.1VulnCheck (CNA) | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
Details
- CVE ID
- CVE-2026-121968
- Status
- Received
- Assigner (CNA)
- VulnCheck
- Published
- Nov 4, 2026
- Last modified
- 2026-11-05 20:17 UTC
- Weaknesses
- CWE-129 · Improper Validation of Array Index
Affected Products
As published by the CNA in the CVE record.
quozlnetrek-client-cow1 version range
- through 3.3.3
References
- 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
- github.com https://github.com/quozl/netrek-client-cow/commit/fb322e74abee3b0b76a9c5a31df6aab5585d3127
- vulncheck.com https://www.vulncheck.com/advisories/netrek-client-cow-through-3.3.3-out-of-bounds-read-via-sp-s-message-packets