Описание
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.
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.
Меры по смягчению последствий
Mitigation 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.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat OpenShift Container Platform 4 | openshift4/ose-coredns | Not affected | ||
| Red Hat OpenShift Container Platform 4 | openshift4/ose-coredns-rhel9 | Affected | ||
| Red Hat Advanced Cluster Management for Kubernetes 2.13 | rhacm2/lighthouse-agent-rhel9 | Fixed | RHSA-2026:36873 | 08.07.2026 |
| Red Hat Advanced Cluster Management for Kubernetes 2.13 | rhacm2/lighthouse-coredns-rhel9 | Fixed | RHSA-2026:36873 | 08.07.2026 |
| Red Hat Advanced Cluster Management for Kubernetes 2.14 | rhacm2/lighthouse-coredns-rhel9 | Fixed | RHSA-2026:25127 | 10.06.2026 |
| Red Hat Advanced Cluster Management for Kubernetes 2.15 | rhacm2/lighthouse-coredns-rhel9 | Fixed | RHSA-2026:8151 | 14.04.2026 |
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Дополнительная информация
Статус:
EPSS
5.3 Medium
CVSS3
Связанные уязвимости
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.
CoreDNS gRPC/HTTPS/HTTP3 servers lack resource limits, enabling DoS via unbounded connections and oversized messages
CoreDNS is a DNS server that chains plugins. Prior to version 1.14.0, ...
CoreDNS gRPC/HTTPS/HTTP3 servers lack resource limits, enabling DoS via unbounded connections and oversized messages
Уязвимость DNS сервера coredns, связанная с неограниченным распределением ресурсов, позволяющая нарушителю вызвать отказ в обслуживании
EPSS
5.3 Medium
CVSS3