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3 vulnerabilities found for net by Go standard library
CVE-2026-33811 (GCVE-0-2026-33811)
Vulnerability from cvelistv5
Published
2026-05-07 19:41
Modified
2026-05-08 14:25
Severity ?
VLAI Severity ?
EPSS score ?
Summary
When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Go standard library | net |
Version: 0 ≤ Version: 1.26.0-0 ≤ |
{
"containers": {
"adp": [
{
"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"
}
},
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"timestamp": "2026-05-08T14:25:39.702568Z",
"version": "2.0.3"
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"providerMetadata": {
"dateUpdated": "2026-05-08T14:25:43.896Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"packageName": "net",
"product": "net",
"programRoutines": [
{
"name": "cgoResSearch"
},
{
"name": "LookupCNAME"
},
{
"name": "Resolver.LookupCNAME"
}
],
"vendor": "Go standard library",
"versions": [
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"lessThan": "1.25.10",
"status": "affected",
"version": "0",
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},
{
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"status": "affected",
"version": "1.26.0-0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "hamayanhamayan"
}
],
"descriptions": [
{
"lang": "en",
"value": "When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "CWE-415: Double Free",
"lang": "en"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-07T19:41:19.285Z",
"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
"shortName": "Go"
},
"references": [
{
"url": "https://go.dev/issue/78803"
},
{
"url": "https://go.dev/cl/767860"
},
{
"url": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M"
},
{
"url": "https://pkg.go.dev/vuln/GO-2026-4981"
}
],
"title": "Crash when handling long CNAME response in net"
}
},
"cveMetadata": {
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"assignerShortName": "Go",
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"datePublished": "2026-05-07T19:41:19.285Z",
"dateReserved": "2026-03-23T20:35:32.814Z",
"dateUpdated": "2026-05-08T14:25:43.896Z",
"state": "PUBLISHED"
},
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"dataVersion": "5.2"
}
CVE-2026-39836 (GCVE-0-2026-39836)
Vulnerability from cvelistv5
Published
2026-05-07 19:41
Modified
2026-05-08 21:30
Severity ?
VLAI Severity ?
EPSS score ?
Summary
The Dial and LookupPort functions panic on Windows when provided with an input containing a NUL (0).
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Go standard library | net |
Version: 0 ≤ Version: 1.26.0-0 ≤ |
{
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"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"
}
},
{
"other": {
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"id": "CVE-2026-39836",
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},
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}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-08T16:36:25.079035Z",
"version": "2.0.3"
},
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],
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"packageName": "net",
"product": "net",
"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"
}
],
"vendor": "Go standard library",
"versions": [
{
"lessThan": "1.25.10",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"lessThan": "1.26.3",
"status": "affected",
"version": "1.26.0-0",
"versionType": "semver"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "The Dial and LookupPort functions panic on Windows when provided with an input containing a NUL (0)."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "CWE-248: Uncaught Exception",
"lang": "en"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-07T19:41:18.300Z",
"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
"shortName": "Go"
},
"references": [
{
"url": "https://go.dev/issue/79006"
},
{
"url": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M"
},
{
"url": "https://go.dev/cl/775320"
},
{
"url": "https://pkg.go.dev/vuln/GO-2026-4971"
}
],
"title": "Panic in Dial and LookupPort when handling NUL byte on Windows in net"
}
},
"cveMetadata": {
"assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
"assignerShortName": "Go",
"cveId": "CVE-2026-39836",
"datePublished": "2026-05-07T19:41:18.300Z",
"dateReserved": "2026-04-07T18:13:03.529Z",
"dateUpdated": "2026-05-08T21:30:15.127Z",
"state": "PUBLISHED"
},
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}
CVE-2024-24788 (GCVE-0-2024-24788)
Vulnerability from cvelistv5
Published
2024-05-08 15:31
Modified
2025-02-13 17:40
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE 400: Uncontrolled Resource Consumption
Summary
A malformed DNS message in response to a query can cause the Lookup functions to get stuck in an infinite loop.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Go standard library | net |
Version: 1.22.0-0 ≤ |
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
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},
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}
],
"role": "CISA Coordinator",
"timestamp": "2024-06-12T19:38:26.198197Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
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"descriptions": [
{
"cweId": "CWE-835",
"description": "CWE-835 Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2024-11-21T15:42:56.985Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2024-08-01T23:28:12.532Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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},
"references": [
{
"tags": [
"x_transferred"
],
"url": "https://go.dev/issue/66754"
},
{
"tags": [
"x_transferred"
],
"url": "https://go.dev/cl/578375"
},
{
"tags": [
"x_transferred"
],
"url": "https://groups.google.com/g/golang-announce/c/wkkO4P9stm0"
},
{
"tags": [
"x_transferred"
],
"url": "https://pkg.go.dev/vuln/GO-2024-2824"
},
{
"tags": [
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],
"url": "http://www.openwall.com/lists/oss-security/2024/05/08/3"
},
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},
{
"tags": [
"x_transferred"
],
"url": "https://security.netapp.com/advisory/ntap-20240614-0001/"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"packageName": "net",
"product": "net",
"programRoutines": [
{
"name": "extractExtendedRCode"
},
{
"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": "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.LookupSRV"
},
{
"name": "Resolver.LookupTXT"
}
],
"vendor": "Go standard library",
"versions": [
{
"lessThan": "1.22.3",
"status": "affected",
"version": "1.22.0-0",
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]
}
],
"credits": [
{
"lang": "en",
"value": "@long-name-let-people-remember-you"
},
{
"lang": "en",
"value": "Mateusz Poliwczak"
}
],
"descriptions": [
{
"lang": "en",
"value": "A malformed DNS message in response to a query can cause the Lookup functions to get stuck in an infinite loop."
}
],
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{
"description": "CWE 400: Uncontrolled Resource Consumption",
"lang": "en"
}
]
}
],
"providerMetadata": {
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"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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{
"url": "https://groups.google.com/g/golang-announce/c/wkkO4P9stm0"
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"url": "https://pkg.go.dev/vuln/GO-2024-2824"
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},
{
"url": "https://security.netapp.com/advisory/ntap-20240605-0002/"
},
{
"url": "https://security.netapp.com/advisory/ntap-20240614-0001/"
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],
"title": "Malformed DNS message can cause infinite loop in net"
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},
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