CVE-2025-8677

Resource exhaustion via malformed DNSKEY handling

State: Published
Severity: 7.5 High
Published: Oct 22, 2025
Updated: Nov 4, 2025
Reserved: Aug 6, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	isc

Weaknesses

CWE-405 Asymmetric Resource Consumption (Amplification)

Affected Products

Product	Versions
BIND 9ISC	9.18.0 through 9.18.39Affected 9.20.0 through 9.20.13Affected 9.21.0 through 9.21.12Affected 9.18.11-S1 through 9.18.39-S1Affected 9.20.9-S1 through 9.20.13-S1Affected

References

CVE-2025-8677vendor-advisory
http://www.openwall.com/lists/oss-security/2025/10/22/1

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