CVEvulnerability

CVE-2026-5950

5.3 MEDIUM Published 2026-05-20 Modified 2026-07-23 Official page ↗
Status
Analyzed
Published
2026-05-20
Last modified
2026-07-23
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weaknesses
CWE-606

Description

An unbounded resend loop vulnerability exists in the BIND 9 resolver state machine during bad-server handling, enabling a remote unauthenticated attacker to cause severe resource exhaustion by sending queries that trigger specific retry conditions. This issue affects BIND 9 versions 9.18.36 through 9.18.48, 9.20.8 through 9.20.22, 9.21.7 through 9.21.21, 9.18.36-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.

Affected configurations

• isc bind (>= 9.18.36 < 9.18.49) • isc bind (>= 9.20.8 < 9.20.23) • isc bind (>= 9.21.7 < 9.21.21)

Related

Weakness · CWE (1)

  • CWE-606 Unchecked Input for Loop Condition weakness

References