CVE-2026-32934
Fixed in a distro release EPSS <1%CVSS 8.7
CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the DNS-over-QUIC (DoQ) server can be driven into unbounded goroutine and memory growth by a remote client that opens many QUIC streams and sends only 1 byte per stream. When the worker pool is full, CoreDNS still spawns a goroutine per accepted stream to wait for a worker token. Additionally, active workers block indefinitely in io.ReadFull() with no per-stream read deadline, allowing an attacker to pin all workers by sending a single byte so the read blocks waiting for the second byte of the DoQ length prefix. This enables an unauthenticated remote attacker to cause memory exhaustion and OOM-kill. This issue has been fixed in version 1.14.3. No known workarounds exist.
Products: coredns
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| Go | github.com/coredns/coredns | 1.14.3 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | coredns-1.13 | no fix |
| Chainguard | coredns-fips-1.13 | no fix |
| Chainguard | eks-distro-coredns-1.30 | no fix |
| Chainguard | eks-distro-coredns-1.31 | 1.31.43-r2 |
| Chainguard | eks-distro-coredns-1.32 | 1.32.36-r2 |
| Chainguard | eks-distro-coredns-1.33 | 1.33.26-r2 |
| Chainguard | eks-distro-coredns-1.34 | 1.34.17-r2 |
| Chainguard | eks-distro-coredns-1.35 | 1.35.8-r2 |
| Chainguard | eks-distro-coredns-1.36 | 1.36.2-r6 |
| Chainguard | eks-distro-coredns-fips-1.30 | no fix |
| Chainguard | eks-distro-coredns-fips-1.31 | 1.31.43-r2 |
| Chainguard | eks-distro-coredns-fips-1.32 | 1.32.36-r2 |
| Chainguard | eks-distro-coredns-fips-1.33 | 1.33.26-r2 |
| Chainguard | eks-distro-coredns-fips-1.34 | 1.34.17-r2 |
| Chainguard | eks-distro-coredns-fips-1.35 | 1.35.8-r2 |
| Chainguard | eks-distro-coredns-fips-1.36 | 1.36.2-r5 |
| Chainguard | juicefs-1.3 | 1.3.1-r14 |
| Chainguard | k8s_gateway | 1.8.0-r1 |
| Chainguard | k8s_gateway-fips | 1.8.0-r1 |
| Chainguard | kubernetes-dns-node-cache | 1.26.8-r3 |
| Chainguard | kubernetes-dns-node-cache-fips | 1.26.8-r2 |
| Chainguard | kuma-coredns-1.13 | no fix |
| Wolfi | coredns-1.13 | no fix |
| Wolfi | juicefs-1.3 | 1.3.1-r14 |
| Wolfi | k8s_gateway | 1.8.0-r1 |
| Wolfi | kubernetes-dns-node-cache | 1.26.8-r3 |
| Wolfi | kuma-coredns-1.13 | no fix |
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260723T184607-160000.1.1 |