An update for coredns is now available for openEuler-24.03-LTS-SP3 Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2026-4195 Final 1.0 1.0 2026-09-30 Initial 2026-09-30 2026-09-30 openEuler SA Tool V1.0 2026-09-30 coredns security update An update for coredns is now available for openEuler-24.03-LTS-SP3 CoreDNS is a fast and flexible DNS server. The key word here is flexible: with CoreDNS you are able to do what you want with your DNS data by utilizing plugins. Security Fix(es): 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.(CVE-2026-82399) 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 listeners in plugin/pkg/doh/doh.go, core/dnsserver/server_quic.go, and core/dnsserver/server_grpc.go call dns.Msg.Unpack without the dns.DefaultMsgAcceptFunc request policy used by UDP, TCP, and DNS-over-TLS. An unauthenticated client can send an RFC 2136 UPDATE that the proxy or forward plugin passes unchanged to an update-capable upstream. If that upstream trusts CoreDNS's source address or connection and does not require an attacker-unknown end-to-end TSIG, the request appears to originate from CoreDNS and can add, replace, or delete DNS records, redirect traffic, take over names, alter mail routing, or disrupt the writable zone. This issue is fixed in version 1.14.7.(CVE-2026-86003) An update for coredns is now available for openEuler-24.03-LTS-SP3. openEuler Security has rated this update as having a security impact of high. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section. High coredns https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4195 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-82399 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-86003 https://nvd.nist.gov/vuln/detail/CVE-2026-82399 https://nvd.nist.gov/vuln/detail/CVE-2026-86003 openEuler-24.03-LTS-SP3 coredns-1.7.0-1.11.oe2403sp3.aarch64.rpm coredns-help-1.7.0-1.11.oe2403sp3.aarch64.rpm coredns-1.7.0-1.11.oe2403sp3.src.rpm coredns-1.7.0-1.11.oe2403sp3.x86_64.rpm coredns-help-1.7.0-1.11.oe2403sp3.x86_64.rpm 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. 2026-09-30 CVE-2026-82399 openEuler-24.03-LTS-SP3 High 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H coredns security update 2026-09-30 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4195 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 listeners in plugin/pkg/doh/doh.go, core/dnsserver/server_quic.go, and core/dnsserver/server_grpc.go call dns.Msg.Unpack without the dns.DefaultMsgAcceptFunc request policy used by UDP, TCP, and DNS-over-TLS. An unauthenticated client can send an RFC 2136 UPDATE that the proxy or forward plugin passes unchanged to an update-capable upstream. If that upstream trusts CoreDNS's source address or connection and does not require an attacker-unknown end-to-end TSIG, the request appears to originate from CoreDNS and can add, replace, or delete DNS records, redirect traffic, take over names, alter mail routing, or disrupt the writable zone. This issue is fixed in version 1.14.7. 2026-09-30 CVE-2026-86003 openEuler-24.03-LTS-SP3 High 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N coredns security update 2026-09-30 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4195