CVE-2025-8677

Resource exhaustion via malformed DNSKEY handling

At a glance

Severity: HIGH 7.5
EPSS: EPSS 10.74 % · percentile 96 (2026-10-27)
State: PUBLISHED
Published: 2025-10-22
Updated: 2025-11-04
Assigner: isc
NVD status: Deferred

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

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	isc
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	NVD · security-officer@isc.org (Secondary)

Weaknesses (CWE)

CWE-405

European references

ENISA EUVD · EUVD-2025-35583
GCVE · GCVE-0-2025-8677

CERT-FR advisories

CERTFR-2026-AVI-1376 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
CERTFR-2026-AVI-0326 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
CERTFR-2026-AVI-0316 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
CERTFR-2025-AVI-0969 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
CERTFR-2025-AVI-0941 — Multiples vulnérabilités dans les produits Microsoft · cert.ssi.gouv.fr
CERTFR-2025-AVI-0913 — Multiples vulnérabilités dans ISC BIND · cert.ssi.gouv.fr

Affected products

Product	Versions
ISC · BIND 9	affected 9.18.0 ≤ 9.18.39 ; affected 9.20.0 ≤ 9.20.13 ; affected 9.21.0 ≤ 9.21.12 ; affected 9.18.11-S1 ≤ 9.18.39-S1 ; affected 9.20.9-S1 ≤ 9.20.13-S1

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD