{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-62309","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-07-13T19:27:58.314Z","datePublished":"2026-07-16T19:42:17.867Z","dateUpdated":"2026-07-18T03:14:46.896Z"},"containers":{"cna":{"title":"CoreDNS: proxyproto plugin panics on PPv2 datagram with non-UDP transport — single 28-byte packet remote DoS","problemTypes":[{"descriptions":[{"cweId":"CWE-476","lang":"en","description":"CWE-476: NULL Pointer Dereference","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/coredns/coredns/security/advisories/GHSA-9rvv-m5g5-wc8r","tags":["x_refsource_CONFIRM"],"url":"https://github.com/coredns/coredns/security/advisories/GHSA-9rvv-m5g5-wc8r"},{"name":"https://github.com/coredns/coredns/pull/8154","tags":["x_refsource_MISC"],"url":"https://github.com/coredns/coredns/pull/8154"},{"name":"https://github.com/coredns/coredns/commit/60a439dd4febfcd78e3779e952fe3fbf3c16bb1f","tags":["x_refsource_MISC"],"url":"https://github.com/coredns/coredns/commit/60a439dd4febfcd78e3779e952fe3fbf3c16bb1f"},{"name":"https://github.com/coredns/coredns/releases/tag/v1.14.4","tags":["x_refsource_MISC"],"url":"https://github.com/coredns/coredns/releases/tag/v1.14.4"}],"affected":[{"vendor":"coredns","product":"coredns","versions":[{"version":"< 1.14.4","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-07-16T19:42:17.867Z"},"descriptions":[{"lang":"en","value":"CoreDNS is a DNS server written in Go. Prior to 1.14.4, a single 28-byte UDP datagram can crash the CoreDNS process when the proxyproto plugin is enabled because plugin/pkg/proxyproto/proxyproto.go PacketConn.ReadFrom handles a PROXY v2 header with non-UDP transport such as family byte 0x11, reassigns addr from a nil readFrom result after parseProxyProtocol errors, and calls addr.String() in the warning log before ServeDNS recovery applies. This issue is fixed in version 1.14.4."}],"source":{"advisory":"GHSA-9rvv-m5g5-wc8r","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-18T03:14:35.332561Z","id":"CVE-2026-62309","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-18T03:14:46.896Z"}}]}}