CVE-2025-8677 - CVE House
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Status published High CVE-2025-8677

Resource exhaustion via malformed DNSKEY handling

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • 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.

References

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Affected Vendor

Affected Software

BIND 9
Vulnerable Versions:
9.18.0, 9.20.0, 9.21.0, 9.18.11-S1, 9.20.9-S1

Timeline

Official Publish: October 22nd, 2025
Last Modified: November 4th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

CWE-405

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.