Name: CVE-2026-18321: Buffer Copy without Checking Size of Input
Creator: Rapid7
Published: 2026-07-31T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-18321, CWE-120, CVSS 4.7, EPSS 0.00111

Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpd

CVSS Details

CVSS 3.1 Base Score: 4.7
CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Alpine Linux	—	Upgrade ntpsec	Aug 3, 2026	Jul 31, 2026

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CVSS Details

Covered by Rapid7

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