Vulnerability record · CVE-2026-66374 · published 25 July 2026

CVE-2026-66374: Knot Resolver before 6.4.1 allows remote code execution via a heap-based buffer overflow in the DoQ (DNS-over-…

Knot Resolver before 6.4.1 allows remote code execution via a heap-based buffer overflow in the DoQ (DNS-over-QUIC) receive path.

8.1 CVSS 3.1 High EPSS 0.62% · top 52.2% CWE-1284 · CWE-1284 Deferred

8.1CVSS 3.1 base score

0.62%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

3References

30 Jul 2026Last modified by NVD

Description

Knot Resolver before 6.4.1 allows remote code execution via a heap-based buffer overflow in the DoQ (DNS-over-QUIC) receive path.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:L

References

Link	Tags
https://github.com/venglin/knot-doq
https://openwall.com/lists/oss-security/2026/07/23/6
https://github.com/venglin/knot-doq

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-66374), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.