data/cve/v5/GO-2026-6354.json

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.0",
  "cveMetadata": {
    "cveId": "CVE-2026-78662"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc"
      },
      "title": "Prevent DoS on deadlocked undecided channel in golang.org/x/crypto/ssh",
      "descriptions": [
        {
          "lang": "en",
          "value": "Previously, a channel registered in the mux's chanList is not usable until it is established. A malicious peer was able flood the channel's incomingRequests, deadlocking the entire connection. Now, we add an atomic established state, set when a channel becomes usable. Until such a time, handlePacket drops every packet other than the open confirmation/failure, without blocking and without tearing down the connection."
        }
      ],
      "affected": [
        {
          "vendor": "golang.org/x/crypto",
          "product": "golang.org/x/crypto/ssh",
          "collectionURL": "https://pkg.go.dev",
          "packageName": "golang.org/x/crypto/ssh",
          "versions": [
            {
              "version": "0",
              "lessThan": "0.56.0",
              "status": "affected",
              "versionType": "semver"
            }
          ],
          "programRoutines": [
            {
              "name": "channel.handlePacket"
            },
            {
              "name": "channel.responseMessageReceived"
            },
            {
              "name": "channel.Accept"
            },
            {
              "name": "Dial"
            },
            {
              "name": "NewClientConn"
            },
            {
              "name": "NewControlClientConn"
            },
            {
              "name": "NewServerConn"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-770: Allocation of Resources Without Limits or Throttling"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://go.dev/issue/81316"
        },
        {
          "url": "https://go.dev/cl/826504"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/1y3fb2np35U"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-6354"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Will Mortensen"
        }
      ]
    }
  }
}