CVE-2026-18321 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') in ntpsec

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

CVE-2026-18321 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') in ntpsec

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

CVE-2026-18321

CVE-2026-18321 describes a buffer overflow in NTPsec’s Zyfer refclock that can crash ntpd via a local attack. The CVE is listed as a classic buffer overflow (Buffer Copy without Checking Size of Input) affecting ntpsec, but the provided documents do not specify affected versions, exact vulnerable...