CVE-2026-82399— CoreDNS: Unauthenticated memory exhaustion in custom transports
一分钟漏洞结论
影响对象
coredns coredns
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
CoreDNS is a DNS server written in Go. Prior to 1.14.7, the DNS-over-HTTPS, DNS-over-HTTP/3, DNS-over-QUIC, and DNS-over-gRPC request paths in plugin/pkg/doh/doh.go, core/dnsserver/server_quic.go, and core/dnsserver/server_grpc.go call dns.Msg.Unpack on attack
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一、 漏洞 CVE-2026-82399 基础信息
漏洞信息
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
CoreDNS: Unauthenticated memory exhaustion in custom transports
来源: CVE Program / CVE List V5
Vulnerability Description
CoreDNS is a DNS server written in Go. Prior to 1.14.7, the DNS-over-HTTPS, DNS-over-HTTP/3, DNS-over-QUIC, and DNS-over-gRPC request paths in plugin/pkg/doh/doh.go, core/dnsserver/server_quic.go, and core/dnsserver/server_grpc.go call dns.Msg.Unpack on attacker-controlled DNS section counts before dns.DefaultMsgAcceptFunc validates the fixed header. An unauthenticated client can use DNS name compression and excessive section counts to amplify allocation before the plugin chain, so plugin-level rate limiting cannot prevent concurrent requests from exhausting memory and terminating CoreDNS. The ordinary UDP and TCP listeners are not affected because they validate the header first. This issue is fixed in version 1.14.7.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-82399 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-82399 补丁与修复 (1)
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Merge commit from fork · coredns/coredns@530b0a5 · GitHub x_refsource_MISC
CVE-2026-82399 其他参考 (2)
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Release v1.14.7 · coredns/coredns · GitHub x_refsource_MISC
IV. Related Vulnerabilities
V. Comments for CVE-2026-82399
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