CVE-2026-11331
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 condi…
Impact
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.
Affected products
| Product | Affected versions |
|---|---|
| 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. |
Versions were read from the advisory text. No structured product data has been published for this record yet.