VDB
CVE-2026-19662
CVE-2026-19662
PUBLISHED
CVSS 5.9 MEDIUM
Reported by isc · Published September 16, 2026
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.
Risk Scores
CVSS 3.1
5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| ISC | BIND 9 | 9.11.0, 9.20.0, 9.11.3-S1 |
| ISC | BIND 9 | 9.20.9-S1, 9.11.0, 9.20.0 |
| isc | bind | 9.11.0, 9.20.0, 9.11.3-S1 |
Timeline
- Sep 16, 2026 Coalition ESS Score
- Sep 16, 2026 CVE Published
References
- CVE-2026-19662 vendor-advisory
- patch