Vulnerability DatabaseCVE-2025-8677
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CVE-2025-8677
October 22, 2025
Querying for records within a specially crafted zone containing certain malformed DNSKEY records can lead to CPU exhaustion. This issue affects BIND 9 versions 9.18.0 through 9.18.39, 9.20.0 through 9.20.13, 9.21.0 through 9.21.12, 9.18.11-S1 through 9.18.39-S1, and 9.20.9-S1 through 9.20.13-S1.
Affected Packages
https://gitlab.isc.org/isc-projects/bind9.git (SCM_GIT):
Affected version(s) >=v9.20.0 <v9.20.15
Fix Suggestion:
Update to version v9.20.15
https://gitlab.isc.org/isc-projects/bind9.git (SCM_GIT):
Affected version(s) >=v9.21.0 <v9.21.14
Fix Suggestion:
Update to version v9.21.14
https://gitlab.isc.org/isc-projects/bind9.git (SCM_GIT):
Affected version(s) >=v9.18.0 <v9.18.41
Fix Suggestion:
Update to version v9.18.41
Related Resources (2)
https://kb.isc.org/docs/cve-2025-8677
http://www.openwall.com/lists/oss-security/2025/10/22/1
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Asymmetric Resource Consumption (Amplification)
CWE-405
EPSS
Base Score:
0.08