BIND 9 Vulnerability in DNSKEY Record Processing by ISC
CVE-2025-8677

7.5HIGH

Key Information:

Vendor

Isc
Status
Bind 9
Vendor
CVE Published:
22 October 2025

Badges

👾 Exploit Exists

What is CVE-2025-8677?

The vulnerability allows an attacker to exploit specifically crafted DNSKEY records within a zone to initiate queries, potentially leading to excessive CPU consumption. This can impact the performance and availability of the affected BIND 9 servers. Administrators should ensure they are using updated versions and apply recommended security measures to mitigate this issue.

Affected Version(s)

BIND 9 9.18.0 <= 9.18.39

BIND 9 9.20.0 <= 9.20.13

BIND 9 9.21.0 <= 9.21.12

References

https://kb.isc.org/docs/cve-2025-8677
vendor-advisory

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

ISC would like to thank Zuyao Xu and Xiang Li from the All-in-One Security and Privacy Laboratory at Nankai University for bringing this vulnerability to our attention.
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CVE-2025-8677 : BIND 9 Vulnerability in DNSKEY Record Processing by ISC