CVE-2025-58063: CoreDNS: DNS Cache Pinning via etcd Lease ID Confusion

September 9, 2025 (updated September 10, 2025)

The CoreDNS etcd plugin contains a TTL confusion vulnerability where lease IDs are incorrectly used as TTL values, enabling cache pinning for very long periods. This can effectively cause a denial of service for DNS updates/changes to affected services.

References

github.com/advisories/GHSA-93mf-426m-g6x9
github.com/coredns/coredns
github.com/coredns/coredns/commit/e1768a5d272e9da649dfb8588595e5c6e4e640bf
github.com/coredns/coredns/security/advisories/GHSA-93mf-426m-g6x9
nvd.nist.gov/vuln/detail/CVE-2025-58063

Code Behaviors & Features

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