CVEvulnerability
CVE-2026-11331
7.5 HIGH
Official page ↗
- Status
- Undergoing Analysis
- Published
- 2026-07-22
- Last modified
- 2026-10-24
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weaknesses
- CWE-790
Description
An attacker who knows (or guesses) that a resolver uses RPZ with wildcard CNAME policies can craft query names long enough to trigger a NAMETOOLONG error condition during RPZ processing. This is not handled correctly and may lead to defeating the RPZ rule. It also may lead to an unexpected exit of the BIND 9 software.
This issue affects BIND 9 versions 9.16.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.16.8-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.
Related
Weakness · CWE (1)
- CWE-790 Improper Filtering of Special Elements weakness
References
- https://downloads.isc.org/isc/bind9/9.20.26 downloads.isc.org
- https://downloads.isc.org/isc/bind9/9.21.24 downloads.isc.org
- https://kb.isc.org/docs/cve-2026-11331 kb.isc.org