GHSA-cvx7-x8pj-x2gw · 深刻度: high · エコシステム: go — CoreDNS Vulnerable to DoQ Memory Exhaustion via Stream Amplification
CoreDNS is a DNS server that chains plugins. In versions prior to 1.12.2, a Denial of Service (DoS) vulnerability exists in the CoreDNS DNS-over-QUIC (DoQ) server implementation. The server previously created a new goroutine for every incoming QUIC stream without imposing any limits on the number of concurrent streams or goroutines. A remote, unauthenticated attacker could open a large number of streams, leading to uncontrolled memory consumption and eventually causing an Out Of Memory (OOM) crash — especially in containerized or memory-constrained environments. The patch in version 1.12.2 introduces two key mitigation mechanisms: `max_streams`, which caps the number of concurrent QUIC streams per connection with a default value of `256`; and `worker_pool_size`, which Introduces a server-wide, bounded worker pool to process incoming streams with a default value of `1024`. This eliminates the 1:1 stream-to-goroutine model and ensures that CoreDNS remains resilient under high concurrency. Some workarounds are available for those who are unable to upgrade. Disable QUIC support by removing or commenting out the `quic://` block in the Corefile, use container runtime resource limits to detect and isolate excessive memory usage, and/or monitor QUIC connection patterns and alert on anomalies.
総合評価: CVE-2025-47950 は中リスク(52.7/100)。CVSS 深刻度は高。悪用される可能性が高い(EPSS 1.13%、62 パーセンタイル) 推奨対応: 影響資産を整理し、修補計画に組み込んでください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置(高いほど相対的に深刻)を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ(新 − 旧) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.15% | 1.13% | +0.98% |
| 2 | 2026-04-02 | 0.05% | 0.15% | +0.10% |
| 3 | 2026-01-18 | — | 0.05% | — |
EPSS の全履歴 (全 10 件)
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
GHSA-cvx7-x8pj-x2gw · 深刻度: high · エコシステム: go — CoreDNS Vulnerable to DoQ Memory Exhaustion via Stream Amplification
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2025-47950: 1 source package rows (coredns); 16 state rows across 2 repos (3.22-community, edge-community); fixed 0, open 16. | https://security.alpinelinux.org/vuln/CVE-2025-47950 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2025-47950 |
suse
|
medium | CVE-2025-47950 severity moderate: SUSE including 37 source package names (govulncheck-vulndb-0.0.20250612T141001-1.1, govulncheck-vulndb-0.0.20250814T182633-160000.1.2, …), 38 product×package rows across 5 product lines (Container suse/sl-micro/6.0/baremetal-os-container, Image SLE-Micro-Azure, … (5 product lines)): Fixed 38. | https://www.suse.com/security/cve/CVE-2025-47950/ |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| coredns.io | coredns | < 1.12.2 | cpe:2.3:a:coredns.io:coredns:*:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://datatracker.ietf.org/doc/html/rfc9250 | Technical Description |
| https://github.com/coredns/coredns/commit/efaed02c6a480ec147b1f799aab7cf815b17dfe1 | Patch |
| https://github.com/coredns/coredns/security/advisories/GHSA-cvx7-x8pj-x2gw | Vendor Advisory |
| https://github.com/quic-go/quic-go | Not Applicable |
| https://www.usenix.org/conference/usenixsecurity23/presentation/botella | Broken Link |