7.5
High
CVE-2026-26018 CoreDNS is a DNS server that chains plugins
Description
CoreDNS is a DNS server that chains plugins. Prior to version 1.14.2, a denial of service vulnerability exists in CoreDNS's loop detection plugin that allows an attacker to crash the DNS server by sending specially crafted DNS queries. The vulnerability stems from the use of a predictable pseudo-random number generator (PRNG) for generating a secret query name, combined with a fatal error handler that terminates the entire process. This issue has been patched in version 1.14.2.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Advanced Cluster Management for Kubernetes 2.14 1780204249 | earliest → < 1780204249 | 1780204249 |
| Red Hat Advanced Cluster Management for Kubernetes 2.15 1774086225 | earliest → < 1774086225 | 1774086225 |
| Red Hat Connectivity Link 1 | Versions not published | |
| Red Hat OpenShift Container Platform 4 | Versions not published | |
| coredns 1.14 | earliest → < 1.14.2 | 1.14.2 |
| Red Hat Advanced Cluster Management for Kubernetes 2.13 1782924937 | earliest → < 1782924937 | 1782924937 |
References
- github.com github.com
- github.com github.com
Timeline
- Published
- Last modified
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