CVE-2026-12245CWE-416

Denial of DNS over TLS service by any DoT client

High · published June 25, 2026

CVSS v4.0
8.7
EPSS
0%
Percentile
38.9
In the wild
Unconfirmed
What it is

NSD from version 4.13.0 has a heap use-after-free bug in logging errors on TLS connections, causing a crash of the server process, which can be triggered trivially by sending a DNS query over a DoT connection, and closing the connection without reading the response.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00460 · 38.9th percentile
Weakness
CWE-416 · Use After Free
Published
2026-06-25T05:24Z
EPSS history
Timeline
  • 25 JUN 05:24Z
    Denial of DNS over TLS service by any DoT client
    cvelistv5