CVE-2026-66374

Knot Resolver Heap Buffer Overflow in DoQ Receive Path

Published Jul 25, 2026 CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Title Knot Resolver Heap Buffer Overflow in DoQ Receive Path
Type Values Removed Values Added
Title Remote Code Execution via DoQ Heap Buffer Overflow in Knot Resolver
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Remote Code Execution via DoQ Heap Buffer Overflow in Knot Resolver
Type Values Removed Values Added
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.
First Time appeared Nic
Nic knot Resolver
Weaknesses CWE-1284
CPEs cpe:2.3:a:nic:knot_resolver:*:*:*:*:*:*:*:*
Vendors & Products Nic
Nic knot Resolver
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Jul 27, 2026, 2:36 PM
Reserved
Jul 25, 2026, 12:28 AM
Status
Deferred
Published
Jul 25, 2026, 1:16 AM
Modified
Oct 24, 2026, 1:10 PM