CVE-2026-121968

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{"bugzilla": {"description": "netrek-client-cow: netrek-client-cow: Denial of Service via crafted server messages", "id": "2567749", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2567749"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "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.", "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)."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-121968", "public_date": "2026-11-04T20:36:46Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-121968\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-121968\nhttps://github.com/quozl/netrek-client-cow\nhttps://github.com/quozl/netrek-client-cow/blob/3.3.3/short.c#L942-L943\nhttps://github.com/quozl/netrek-client-cow/commit/fb322e74abee3b0b76a9c5a31df6aab5585d3127\nhttps://www.vulncheck.com/advisories/netrek-client-cow-through-3.3.3-out-of-bounds-read-via-sp-s-message-packets"], "statement": "This flaw is assessed as having a Moderate severity because exploitation requires an interactive connection to an untrusted or compromised game server, and the impact is restricted to terminating the client application. The package operates in unprivileged user space without administrative privileges, preventing broader host disruption or compromise of data confidentiality and integrity. Furthermore, this component is not included or enabled in supported Red Hat Enterprise Linux releases.", "threat_severity": "Moderate"}

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