CVE-2026-121968

MEDIUMCVSS 6.5/10EPSS 0.33%

Last modified

CVE-2026-121968 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 0.33% chance of exploitation in the next 30 days.

Description

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.

Metrics

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
quozlnetrek-client-cow<= 3.3.3

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-121968?
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.
How severe is CVE-2026-121968?
CVE-2026-121968 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.33% probability of exploitation in the next 30 days.
How do I fix CVE-2026-121968?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST