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Fencer Intel
high 7.5

CVE-2025-68151 json

CoreDNS gRPC/HTTPS/HTTP3 servers lack resource limits, enabling DoS via unbounded connections and oversized messages

published 10mo ago modified 26d ago also EUVD-2026-1476 , GHSA-527x-5wrf-22m2 , GO-2026-4289

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits
0
none known

Summary

CoreDNS is a DNS server that chains plugins. Prior to version 1.14.0, multiple CoreDNS server implementations (gRPC, HTTPS, and HTTP/3) lack critical resource-limiting controls. An unauthenticated remote attacker can exhaust memory and degrade or crash the server by opening many concurrent connections, streams, or sending oversized request bodies. The issue is similar in nature to CVE-2025-47950 (QUIC DoS) but affects additional server types that do not enforce connection limits, stream limits, or message size constraints. Version 1.14.0 contains a patch.

Patch / fix

  • go github.com/coredns/coredns 1.14.0
  • coredns.io coredns 1.14.0
  • govulncheck-vulndb openSUSE Leap 15.6 0.0.20260114T191543-150000.1.137.1

suse advisories SUSE-SU-2026:0142-1

  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1

opensuse advisories openSUSE-SU-2026:21483-1

  • coredns Azure Linux 3.0 1.11.4-13
  • coredns CBL-Mariner 2.0 1.11.1-25

azure linux advisories AZL-73850AZL-74025

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-68151 updated cvss 5.3

github.com/coredns/coredns/core/dnsserver: CoreDNS DoS via unbounded connections and oversized messages

  • Red Hat OpenShift Container Platform 4 openshift4/ose-coredns-rhel9
    affected: workaround, no fix available
  • Red Hat Advanced Cluster Management for Kubernetes 2.13 rhacm2/lighthouse-agent-rhel9 1782924920, rhacm2/lighthouse-coredns-rhel9 1782924937
    fixed: vendor fix RHSA-2026:36873
  • Red Hat Advanced Cluster Management for Kubernetes 2.14 rhacm2/lighthouse-coredns-rhel9 1780204249
    fixed: vendor fix RHSA-2026:25127
  • Red Hat Advanced Cluster Management for Kubernetes 2.15 rhacm2 1774086225
    fixed: vendor fix RHSA-2026:8151
  • Red Hat Advanced Cluster Management for Kubernetes 2.13 rhacm2/subctl-rhel9 1782945263, rhacm2/nettest-rhel9 1782926302, rhacm2/submariner-gateway-rhel9 1782925247, rhacm2/submariner-rhel9-operator 1782933193, rhacm2/submariner-globalnet-rhel9 1782925266, rhacm2/submariner-operator-bundle 1783001304, +1 more Red Hat Advanced Cluster Management for Kubernetes 2.14 rhacm2/subctl-rhel9 1780238563, rhacm2/nettest-rhel9 1780241410, rhacm2/lighthouse-agent-rhel9 1780204232, rhacm2/submariner-gateway-rhel9 1780204887, rhacm2/submariner-rhel9-operator 1780204322, rhacm2/submariner-globalnet-rhel9 1780204696, +2 more Red Hat Advanced Cluster Management for Kubernetes 2.15 rhacm2 1774084104, rhacm2 1774085848, rhacm2 1774332596, rhacm2 1774372741, rhacm2 1774550347, rhacm2 1774550350, +2 more Red Hat OpenShift Container Platform 4 openshift4/ose-coredns
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
10mo ago

Exploit prediction

0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 4.0 6.6 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U
CNA 4.0 6.6 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go github.com/coredns/coredns
<1.14.0
1.14.0

Affected products

  • coredns coredns

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.