# CVE-2026-5946

> Multiple flaws have been identified in `named` related to the handling of DNS messages whose CLASS is not Internet (`IN`) — for example, `CHAOS` or `HESIOD`, or DNS messages that specify meta-classes (`ANY` or `NONE`) in the question section. Specially crafted requests reaching the affected code paths — recursion, dynamic updates (`UPDATE`), zone change notifications (`NOTIFY`), or processing of `IN`-specific record types in non-`IN` data — can cause assertion failures in `named`. This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.48, 9.20.0 through 9.20.22, 9.21.0 

- **CVSS:** 7.5 (HIGH)
- **EPSS:** 0.1%
- **CWE:** CWE-20, CWE-125, CWE-617, CWE-754, CWE-843

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-5946
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