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CVE-2026-33811 Crash when handling long CNAME response in net

🗓️ 07 May 2026 19:41:19Reported by GoType 
cvelist
 cvelist
🔗 www.cve.org👁 113 Views

CVE-2026-33811 causes a crash due to a double-free in C memory when handling very long CNAME responses in net LookupCNAME with the Go resolver.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
osv
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MINI-FM2Q-P8JV-W29M
12 May 202603:48
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MINI-FQ3G-P56R-M8XV
12 May 202603:48
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MINI-FQ5X-5R6J-Q5H8
11 May 202619:33
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MINI-FQHM-W2R8-53R5
11 May 202619:02
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MINI-FRHX-7GMH-2XC8
11 May 202606:03
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OSV
MINI-FRX8-W79J-RJMC
11 May 202606:03
osv
osv
OSV
MINI-FV24-WHGG-2QJ3
11 May 202613:33
osv
osv
OSV
MINI-FVHG-V9RF-C28M
10 May 202614:35
osv
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OSV
MINI-FVQ5-5FPR-5M4C
11 May 202614:05
osv
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OSV
MINI-FW79-57JV-P876
11 May 202606:32
osv
Rows per page
[
  {
    "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": "cgoResSearch"
      },
      {
        "name": "LookupCNAME"
      },
      {
        "name": "Resolver.LookupCNAME"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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