CVE-2025-68151 — Allocation of Resources Without Limits or Throttling in Coredns Coredns
Severity
6.6MEDIUMNVD
GHSA7.5OSV7.5
EPSS
0.1%
top 65.88%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedJan 8
Latest updateJan 12
Description
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, …
CVSS vector
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
Affected Packages2 packages
Patches
🔴Vulnerability Details
3OSV▶
CoreDNS gRPC/HTTPS/HTTP3 servers lack resource limits, enabling DoS via unbounded connections and oversized messages in github.com/coredns/coredns↗2026-01-12
OSV▶
CoreDNS gRPC/HTTPS/HTTP3 servers lack resource limits, enabling DoS via unbounded connections and oversized messages↗2026-01-08
GHSA▶
CoreDNS gRPC/HTTPS/HTTP3 servers lack resource limits, enabling DoS via unbounded connections and oversized messages↗2026-01-08
📋Vendor Advisories
1Red Hat▶
github.com/coredns/coredns/core/dnsserver: CoreDNS DoS via unbounded connections and oversized messages↗2026-01-08