← Back

CVE-2026-5950

nvd nist
Published: May 20, 2026Modified: Jul 23, 2026

JSON object

Loading...
5.3
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Exploitability: 3.9 / Impact: 1.4
Source: security-officer@isc.org (Secondary)

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 (3)

Products: Isc: Bind
Isc
1 product
Bind
Configuration A
3 vulnerable
Vulnerable SoftwareAffected Versions
Isc
Bind
From 9.18.36 to 9.18.49
Bind
From 9.20.8 to 9.20.23
Bind
From 9.21.7 to 9.21.21

Related CWEs

CWE-606
Unchecked Input for Loop Condition
The product does not properly check inputs that are used for loop conditions, potentially leading to a denial of service or other consequences because of excessive looping.

References (4)

Source: security-officer@isc.org
Patch
Source: security-officer@isc.org
Patch
Source: security-officer@isc.org
Patch
Source: security-officer@isc.org
Vendor Advisory

Timeline

No history available yet.