CVE-2026-19662
An attacker may be able to cause a `named` resolver to abort. The attack requires inducing the victim resolver to send multiple queries for a DNSSEC-signed zone hosted by an authoritative server under the control of the attacker. If the auth responds with a particular sequence of crafted answers, and those answers arrive in a particular order with particular timing, the `named` resolver will encounter a use-after-free bug, and abort. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.
- Score
- CVSS 3.1 5.9 Medium
- Status
- Awaiting Analysis - security-officer@isc.org
- Published
- 2026-09-16
- Last modified
- 2026-10-26
- Weaknesses
- CWE-416
Affected products
References
- https://kb.isc.org/docs/cve-2026-19662
- https://downloads.isc.org/isc/bind9/9.20.29
