CVE-2026-81634: Possible heap buffer overflow during DNSSEC canonicalization

Overview

Severity

High (CVSS 7.5)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Sep

Released

2026-09-17

EPSS Score

0.36% (percentile: 29.1%)

Affected Products (1)

Other

• 21878-17084

Security Updates (1)

• Security Update

Revision History

• 2026-09-17: Information published.