CVEvulnerability

CVE-2026-5946

7.5 HIGH Published 2026-05-20 Modified 2026-09-17 Official page ↗
Status
Modified
Published
2026-05-20
Last modified
2026-09-17
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:N/I:N/A:H
CVSS 3.1 (0b0ca135-0b70-47e7-9f44-1890c2a1c46c)
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-125, CWE-1287, CWE-20, CWE-617, CWE-754, CWE-843

Description

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 through 9.21.21, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.

Affected configurations

• isc bind (>= 9.11.0 <= 9.16.50) • isc bind (>= 9.18.0 < 9.18.49) • isc bind (>= 9.20.0 < 9.20.23) • isc bind (>= 9.21.0 < 9.21.22)

Related

Weakness · CWE (6)

  • CWE-125 Out-of-bounds Read weakness
  • CWE-1287 Improper Validation of Specified Type of Input weakness
  • CWE-20 Improper Input Validation weakness
  • CWE-617 Reachable Assertion weakness
  • CWE-754 Improper Check for Unusual or Exceptional Conditions weakness
  • CWE-843 Access of Resource Using Incompatible Type weakness

References