CVE-2026-56416: Possible heap buffer overflow when validator canonicalizes RDATA that contains domain name

Overview

Severity

Medium (CVSS 4.8)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Jul

Released

2026-07-23

Last Updated

2026-07-23

EPSS Score

0.12% (percentile: 2.3%)

Affected Products (1)

Other

• 21595-17084

Revision History

• 2026-07-23: Information published.
• 2026-07-23: Information published.