CVE-2026-12245
7.5
HIGH
CVSS 3.1
EPSS 0.27%
Description
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.
How to fix CVE-2026-12245
To remediate CVE-2026-12245, upgrade the affected package to a fixed version below.
- Alpine/nsd—upgrade to 4.14.3-r0 or later
Is CVE-2026-12245 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 4.13.0, < 4.14.3-r0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |