CVE-2026-121968

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    CVE-2026-121968

    Published: 4 Nov 2026Last Modified: 7 Nov 2026

    Summary: Netrek-client-cow through 3.3.3 Out-of-Bounds Read via SP_S_MESSAGE Packets

    Details: 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.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121968.json, https://nvd.nist.gov/vuln/detail/CVE-2026-121968, https://www.vulncheck.com/advisories/netrek-client-cow-through-3.3.3-out-of-bounds-read-via-sp-s-message-packets, https://github.com/quozl/netrek-client-cow/commit/fb322e74abee3b0b76a9c5a31df6aab5585d3127, https://github.com/quozl/netrek-client-cow, https://github.com/quozl/netrek-client-cow/blob/3.3.3/short.c#L942-L943

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -fb322e74abee3b0b76a9c5a31df6aab5585d3127

    Affected versions

    3.3.3
    3.3.2

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-121968 | CVE-DB