What is GHSA-6978-pcpc-2c45?

GHSA-6978-pcpc-2c45 is a security advisory published by GitHub Security Advisories with Medium severity. Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpd

Which CVE IDs does GHSA-6978-pcpc-2c45 cover?

GHSA-6978-pcpc-2c45 covers the following CVE IDs: CVE-2026-18321. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-6978-pcpc-2c45?

GHSA-6978-pcpc-2c45 has a CVSS v3 base score of 4.7, published by GitHub Security Advisories.

GHSA-6978-pcpc-2c45MediumCVSS 4.7

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

Vendor

GitHub Security Advisories

Published

July 31, 2026

Last Modified

July 31, 2026

🔗 CVE IDs covered (1)

CVE-2026-18321 →

📋 Description

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

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-18321
https://gitlab.com/NTPsec/ntpsec/-/work_items/890
https://github.com/advisories/GHSA-6978-pcpc-2c45