No exploitation reportedFix available

CVE-2025-8677

No exploitation reported by the sources we read.

Published2025-10-22
WeaknessCWE-405

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2025-10-2216:15CVE publishedNVD
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2025-8677?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2025-8677?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

RHSA-2026:0674 Red Hat Product Security4 products fixed
Red Hat Security Advisory: OpenShift Container Platform 4.19.22 bug fix and security update
RHSA-2026:0702 Red Hat Product Security4 products fixed
Red Hat Security Advisory: OpenShift Container Platform 4.17.47 bug fix and security update
RHSA-2026:0332 Red Hat Product Security4 products fixed
Red Hat Security Advisory: OpenShift Container Platform 4.18.31 bug fix and security update
RHSA-2026:0420 Red Hat Product Security4 products fixed
Red Hat Security Advisory: OpenShift Container Platform 4.20.10 bug fix and security update
RHSA-2025:21994 Red Hat Product Security2 products fixed
Red Hat Security Advisory: A Subscription Management tool for finding and reporting Red Hat product usage

Full record on NVD

Fix

Vendor fix Red Hat Product Security RHSA-2026:0674 · 4 productsFor OpenShift Container Platform 4.19 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this synchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
Vendor fix Red Hat Product Security RHSA-2026:0702 · 4 productsFor OpenShift Container Platform 4.17 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
Vendor fix Red Hat Product Security RHSA-2026:0332 · 4 productsFor OpenShift Container Platform 4.18 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
Vendor fix Red Hat Product Security RHSA-2026:0420 · 4 productsFor OpenShift Container Platform 4.20 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
Vendor fix Red Hat Product Security RHSA-2025:21994 · 2 productsThe containers required to run Discovery can be installed through discovery-installer RPM. See the official documentation for more details.
Workaround from the vendor Red Hat Product Security RHSA-2026:0674 · 4 productsMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. To reduce risk, restrict recursive queries to trusted or interna…

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionnone2025-10-22
OpenCVESSVC decisionnone—
CNACVSS 3.17.5read 2026-10-23
CNAweakness (CWE)CWE-405read 2026-10-23
FIRST EPSSEPSS score10.7 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2025-10-22
Last Modified: 2026-10-08
NVD status: Deferred

Frequently asked questions

What is CVE-2025-8677?

Is CVE-2025-8677 actively exploited?

Active exploitation of CVE-2025-8677 has not been confirmed. Its EPSS score was 10.7% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-8677?

CVE-2025-8677 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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