CVE-2026-18321

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{"bugzilla": {"description": "ntpsec: NTPsec: Denial of Service via buffer overflow in Zyfer refclock", "id": "2509863", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2509863"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-120", "details": ["Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpd", "A flaw was found in NTPsec. A local attacker could exploit a buffer overflow vulnerability in the Zyfer refclock component, leading to the `ntpd` daemon crashing. This could result in a denial of service (DoS), making the network time synchronization service unavailable."], "name": "CVE-2026-18321", "public_date": "2026-07-31T18:04:06Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-18321\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-18321\nhttps://gitlab.com/NTPsec/ntpsec/-/work_items/890"], "statement": "This flaw does not affect Red Hat Products, it only affects community projects.", "threat_severity": "Low"}

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