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Panic in Dial and LookupPort when handling NUL byte on Windows in net

Exact source revision recorded 23 Oct 2026 15:48:27 UTC. It does not establish the source's current position. Latest evidence.

cve-program · CVE-2026-39836

Published

net

https://pkg.go.dev

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "Go standard library",
                    "product": "net",
                    "collectionURL": "https://pkg.go.dev",
                    "packageName": "net",
                    "versions": [
                        {
                            "version": "0",
                            "lessThan": "1.25.10",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "1.26.0-0",
                            "lessThan": "1.26.3",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ],
                    "programRoutines": [
                        {
                            "name": "Resolver.lookupPort"
                        },
                        {
                            "name": "Resolver.lookupAddr"
                        },
                        {
                            "name": "Resolver.lookupTXT"
                        },
                        {
                            "name": "Resolver.lookupNS"
                        },
                        {
                            "name": "Resolver.lookupMX"
                        },
                        {
                            "name": "Resolver.lookupSRV"
                        },
                        {
                            "name": "Dial"
                        },
                        {
                            "name": "DialTimeout"
                        },
                        {
                            "name": "Dialer.Dial"
                        },
                        {
                            "name": "Dialer.DialContext"
                        },
                        {
                            "name": "Listen"
                        },
                        {
                            "name": "ListenConfig.Listen"
                        },
                        {
                            "name": "ListenConfig.ListenPacket"
                        },
                        {
                            "name": "ListenPacket"
                        },
                        {
                            "name": "LookupAddr"
                        },
                        {
                            "name": "LookupCNAME"
                        },
                        {
                            "name": "LookupHost"
                        },
                        {
                            "name": "LookupIP"
                        },
                        {
                            "name": "LookupMX"
                        },
                        {
                            "name": "LookupNS"
                        },
                        {
                            "name": "LookupPort"
                        },
                        {
                            "name": "LookupSRV"
                        },
                        {
                            "name": "LookupTXT"
                        },
                        {
                            "name": "ResolveIPAddr"
                        },
                        {
                            "name": "ResolveTCPAddr"
                        },
                        {
                            "name": "ResolveUDPAddr"
                        },
                        {
                            "name": "Resolver.LookupAddr"
                        },
                        {
                            "name": "Resolver.LookupCNAME"
                        },
                        {
                            "name": "Resolver.LookupHost"
                        },
                        {
                            "name": "Resolver.LookupIP"
                        },
                        {
                            "name": "Resolver.LookupIPAddr"
                        },
                        {
                            "name": "Resolver.LookupMX"
                        },
                        {
                            "name": "Resolver.LookupNS"
                        },
                        {
                            "name": "Resolver.LookupNetIP"
                        },
                        {
                            "name": "Resolver.LookupPort"
                        },
                        {
                            "name": "Resolver.LookupSRV"
                        },
                        {
                            "name": "Resolver.LookupTXT"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

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