GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2025-22869 (GCVE-0-2025-22869)

Vulnerability from cvelistv5 – Published: 2025-02-26 03:07 – Updated: 2025-04-11 22:03
VLAI
Title
Potential denial of service in golang.org/x/crypto
Summary
SSH servers which implement file transfer protocols are vulnerable to a denial of service attack from clients which complete the key exchange slowly, or not at all, causing pending content to be read into memory, but never transmitted.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-26 14:57 UTC
CWE
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
Vendor Product Version CPE status
golang.org/x/crypto golang.org/x/crypto/ssh Affected: 0 , < 0.35.0 (semver)
guessed Create a notification for this product.
Credits
Yuichi Watanabe
Show details on NVD website
To clipboard 

{
  "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-22869",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-02-26T14:57:07.968721Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-770",
                "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-02-26T14:57:49.252Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-04-11T22:03:24.222Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://security.netapp.com/advisory/ntap-20250411-0010/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh",
          "product": "golang.org/x/crypto/ssh",
          "programRoutines": [
            {
              "name": "newHandshakeTransport"
            },
            {
              "name": "handshakeTransport.recordWriteError"
            },
            {
              "name": "handshakeTransport.kexLoop"
            },
            {
              "name": "handshakeTransport.writePacket"
            },
            {
              "name": "Client.Dial"
            },
            {
              "name": "Client.DialContext"
            },
            {
              "name": "Client.DialTCP"
            },
            {
              "name": "Client.Listen"
            },
            {
              "name": "Client.ListenTCP"
            },
            {
              "name": "Client.ListenUnix"
            },
            {
              "name": "Client.NewSession"
            },
            {
              "name": "Dial"
            },
            {
              "name": "DiscardRequests"
            },
            {
              "name": "NewClient"
            },
            {
              "name": "NewClientConn"
            },
            {
              "name": "NewServerConn"
            },
            {
              "name": "Request.Reply"
            },
            {
              "name": "Session.Close"
            },
            {
              "name": "Session.CombinedOutput"
            },
            {
              "name": "Session.Output"
            },
            {
              "name": "Session.RequestPty"
            },
            {
              "name": "Session.RequestSubsystem"
            },
            {
              "name": "Session.Run"
            },
            {
              "name": "Session.SendRequest"
            },
            {
              "name": "Session.Setenv"
            },
            {
              "name": "Session.Shell"
            },
            {
              "name": "Session.Signal"
            },
            {
              "name": "Session.Start"
            },
            {
              "name": "Session.WindowChange"
            },
            {
              "name": "channel.Accept"
            },
            {
              "name": "channel.Close"
            },
            {
              "name": "channel.CloseWrite"
            },
            {
              "name": "channel.Read"
            },
            {
              "name": "channel.ReadExtended"
            },
            {
              "name": "channel.Reject"
            },
            {
              "name": "channel.SendRequest"
            },
            {
              "name": "channel.Write"
            },
            {
              "name": "channel.WriteExtended"
            },
            {
              "name": "connection.SendAuthBanner"
            },
            {
              "name": "curve25519sha256.Client"
            },
            {
              "name": "curve25519sha256.Server"
            },
            {
              "name": "dhGEXSHA.Client"
            },
            {
              "name": "dhGEXSHA.Server"
            },
            {
              "name": "dhGroup.Client"
            },
            {
              "name": "dhGroup.Server"
            },
            {
              "name": "ecdh.Client"
            },
            {
              "name": "ecdh.Server"
            },
            {
              "name": "extChannel.Read"
            },
            {
              "name": "extChannel.Write"
            },
            {
              "name": "mux.OpenChannel"
            },
            {
              "name": "mux.SendRequest"
            },
            {
              "name": "sessionStdin.Close"
            },
            {
              "name": "sshClientKeyboardInteractive.Challenge"
            },
            {
              "name": "tcpListener.Accept"
            },
            {
              "name": "tcpListener.Close"
            },
            {
              "name": "unixListener.Accept"
            },
            {
              "name": "unixListener.Close"
            }
          ],
          "vendor": "golang.org/x/crypto",
          "versions": [
            {
              "lessThan": "0.35.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Yuichi Watanabe"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "SSH servers which implement file transfer protocols are vulnerable to a denial of service attack from clients which complete the key exchange slowly, or not at all, causing pending content to be read into memory, but never transmitted."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-02-26T03:07:48.855Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/cl/652135"
        },
        {
          "url": "https://go.dev/issue/71931"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2025-3487"
        }
      ],
      "title": "Potential denial of service in golang.org/x/crypto"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2025-22869",
    "datePublished": "2025-02-26T03:07:48.855Z",
    "dateReserved": "2025-01-08T19:11:42.834Z",
    "dateUpdated": "2025-04-11T22:03:24.222Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-22869",
      "date": "2026-09-10",
      "epss": "0.00921",
      "percentile": "0.58219"
    },
    "microsoft_vex": {
      "current_release_date": "2026-02-21T03:43:06.000Z",
      "cve": "CVE-2025-22869",
      "id": "msrc_CVE-2025-22869",
      "initial_release_date": "2025-02-02T00:00:00.000Z",
      "product_status:fixed": "37",
      "product_status:known_affected": "37",
      "product_status:known_not_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "Potential denial of service in golang.org/x/crypto",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-22869.json",
      "version": "8"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-22869\",\"sourceIdentifier\":\"security@golang.org\",\"published\":\"2025-02-26T08:14:24.997\",\"lastModified\":\"2026-06-17T08:50:40.113\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"SSH servers which implement file transfer protocols are vulnerable to a denial of service attack from clients which complete the key exchange slowly, or not at all, causing pending content to be read into memory, but never transmitted.\"},{\"lang\":\"es\",\"value\":\"Los servidores SSH que implementan protocolos de transferencia de archivos son vulnerables a un ataque de denegaci\u00f3n de servicio por parte de clientes que completan el intercambio de claves lentamente o no lo completan en absoluto, lo que provoca que el contenido pendiente se lea en la memoria, pero nunca se transmita.\"}],\"affected\":[{\"source\":\"security@golang.org\",\"affectedData\":[{\"vendor\":\"golang.org/x/crypto\",\"product\":\"golang.org/x/crypto/ssh\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://pkg.go.dev\",\"packageName\":\"golang.org/x/crypto/ssh\",\"programRoutines\":[{\"name\":\"newHandshakeTransport\"},{\"name\":\"handshakeTransport.recordWriteError\"},{\"name\":\"handshakeTransport.kexLoop\"},{\"name\":\"handshakeTransport.writePacket\"},{\"name\":\"Client.Dial\"},{\"name\":\"Client.DialContext\"},{\"name\":\"Client.DialTCP\"},{\"name\":\"Client.Listen\"},{\"name\":\"Client.ListenTCP\"},{\"name\":\"Client.ListenUnix\"},{\"name\":\"Client.NewSession\"},{\"name\":\"Dial\"},{\"name\":\"DiscardRequests\"},{\"name\":\"NewClient\"},{\"name\":\"NewClientConn\"},{\"name\":\"NewServerConn\"},{\"name\":\"Request.Reply\"},{\"name\":\"Session.Close\"},{\"name\":\"Session.CombinedOutput\"},{\"name\":\"Session.Output\"},{\"name\":\"Session.RequestPty\"},{\"name\":\"Session.RequestSubsystem\"},{\"name\":\"Session.Run\"},{\"name\":\"Session.SendRequest\"},{\"name\":\"Session.Setenv\"},{\"name\":\"Session.Shell\"},{\"name\":\"Session.Signal\"},{\"name\":\"Session.Start\"},{\"name\":\"Session.WindowChange\"},{\"name\":\"channel.Accept\"},{\"name\":\"channel.Close\"},{\"name\":\"channel.CloseWrite\"},{\"name\":\"channel.Read\"},{\"name\":\"channel.ReadExtended\"},{\"name\":\"channel.Reject\"},{\"name\":\"channel.SendRequest\"},{\"name\":\"channel.Write\"},{\"name\":\"channel.WriteExtended\"},{\"name\":\"connection.SendAuthBanner\"},{\"name\":\"curve25519sha256.Client\"},{\"name\":\"curve25519sha256.Server\"},{\"name\":\"dhGEXSHA.Client\"},{\"name\":\"dhGEXSHA.Server\"},{\"name\":\"dhGroup.Client\"},{\"name\":\"dhGroup.Server\"},{\"name\":\"ecdh.Client\"},{\"name\":\"ecdh.Server\"},{\"name\":\"extChannel.Read\"},{\"name\":\"extChannel.Write\"},{\"name\":\"mux.OpenChannel\"},{\"name\":\"mux.SendRequest\"},{\"name\":\"sessionStdin.Close\"},{\"name\":\"sshClientKeyboardInteractive.Challenge\"},{\"name\":\"tcpListener.Accept\"},{\"name\":\"tcpListener.Close\"},{\"name\":\"unixListener.Accept\"},{\"name\":\"unixListener.Close\"}],\"versions\":[{\"version\":\"0\",\"lessThan\":\"0.35.0\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2025-02-26T14:57:07.968721Z\",\"id\":\"CVE-2025-22869\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-770\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:go:ssh:*:*:*:*:*:go:*:*\",\"versionEndExcluding\":\"0.35.0\",\"matchCriteriaId\":\"311D718D-7E78-4EFC-A3B6-0D20C28956C9\"}]}]}],\"references\":[{\"url\":\"https://go.dev/cl/652135\",\"source\":\"security@golang.org\",\"tags\":[\"Patch\"]},{\"url\":\"https://go.dev/issue/71931\",\"source\":\"security@golang.org\",\"tags\":[\"Issue Tracking\",\"Patch\"]},{\"url\":\"https://pkg.go.dev/vuln/GO-2025-3487\",\"source\":\"security@golang.org\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://security.netapp.com/advisory/ntap-20250411-0010/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-09-10T21:56:28+00:00",
      "cve": "CVE-2025-22869",
      "id": "CVE-2025-22869",
      "initial_release_date": "2025-02-26T03:07:48.855000+00:00",
      "product_status:fixed": "2839",
      "product_status:known_affected": "53",
      "product_status:known_not_affected": "6263",
      "product_status:under_investigation": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "golang.org/x/crypto/ssh: Denial of Service in the Key Exchange of golang.org/x/crypto/ssh",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-22869.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://security.netapp.com/advisory/ntap-20250411-0010/\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-04-11T22:03:24.222Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-22869\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-02-26T14:57:07.968721Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-770\", \"description\": \"CWE-770 Allocation of Resources Without Limits or Throttling\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-02-26T14:57:39.044Z\"}}], \"cna\": {\"title\": \"Potential denial of service in golang.org/x/crypto\", \"credits\": [{\"lang\": \"en\", \"value\": \"Yuichi Watanabe\"}], \"affected\": [{\"vendor\": \"golang.org/x/crypto\", \"product\": \"golang.org/x/crypto/ssh\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"0.35.0\", \"versionType\": \"semver\"}], \"packageName\": \"golang.org/x/crypto/ssh\", \"collectionURL\": \"https://pkg.go.dev\", \"defaultStatus\": \"unaffected\", \"programRoutines\": [{\"name\": \"newHandshakeTransport\"}, {\"name\": \"handshakeTransport.recordWriteError\"}, {\"name\": \"handshakeTransport.kexLoop\"}, {\"name\": \"handshakeTransport.writePacket\"}, {\"name\": \"Client.Dial\"}, {\"name\": \"Client.DialContext\"}, {\"name\": \"Client.DialTCP\"}, {\"name\": \"Client.Listen\"}, {\"name\": \"Client.ListenTCP\"}, {\"name\": \"Client.ListenUnix\"}, {\"name\": \"Client.NewSession\"}, {\"name\": \"Dial\"}, {\"name\": \"DiscardRequests\"}, {\"name\": \"NewClient\"}, {\"name\": \"NewClientConn\"}, {\"name\": \"NewServerConn\"}, {\"name\": \"Request.Reply\"}, {\"name\": \"Session.Close\"}, {\"name\": \"Session.CombinedOutput\"}, {\"name\": \"Session.Output\"}, {\"name\": \"Session.RequestPty\"}, {\"name\": \"Session.RequestSubsystem\"}, {\"name\": \"Session.Run\"}, {\"name\": \"Session.SendRequest\"}, {\"name\": \"Session.Setenv\"}, {\"name\": \"Session.Shell\"}, {\"name\": \"Session.Signal\"}, {\"name\": \"Session.Start\"}, {\"name\": \"Session.WindowChange\"}, {\"name\": \"channel.Accept\"}, {\"name\": \"channel.Close\"}, {\"name\": \"channel.CloseWrite\"}, {\"name\": \"channel.Read\"}, {\"name\": \"channel.ReadExtended\"}, {\"name\": \"channel.Reject\"}, {\"name\": \"channel.SendRequest\"}, {\"name\": \"channel.Write\"}, {\"name\": \"channel.WriteExtended\"}, {\"name\": \"connection.SendAuthBanner\"}, {\"name\": \"curve25519sha256.Client\"}, {\"name\": \"curve25519sha256.Server\"}, {\"name\": \"dhGEXSHA.Client\"}, {\"name\": \"dhGEXSHA.Server\"}, {\"name\": \"dhGroup.Client\"}, {\"name\": \"dhGroup.Server\"}, {\"name\": \"ecdh.Client\"}, {\"name\": \"ecdh.Server\"}, {\"name\": \"extChannel.Read\"}, {\"name\": \"extChannel.Write\"}, {\"name\": \"mux.OpenChannel\"}, {\"name\": \"mux.SendRequest\"}, {\"name\": \"sessionStdin.Close\"}, {\"name\": \"sshClientKeyboardInteractive.Challenge\"}, {\"name\": \"tcpListener.Accept\"}, {\"name\": \"tcpListener.Close\"}, {\"name\": \"unixListener.Accept\"}, {\"name\": \"unixListener.Close\"}]}], \"references\": [{\"url\": \"https://go.dev/cl/652135\"}, {\"url\": \"https://go.dev/issue/71931\"}, {\"url\": \"https://pkg.go.dev/vuln/GO-2025-3487\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"SSH servers which implement file transfer protocols are vulnerable to a denial of service attack from clients which complete the key exchange slowly, or not at all, causing pending content to be read into memory, but never transmitted.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"description\": \"CWE-770: Allocation of Resources Without Limits or Throttling\"}]}], \"providerMetadata\": {\"orgId\": \"1bb62c36-49e3-4200-9d77-64a1400537cc\", \"shortName\": \"Go\", \"dateUpdated\": \"2025-02-26T03:07:48.855Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-22869\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-04-11T22:03:24.222Z\", \"dateReserved\": \"2025-01-08T19:11:42.834Z\", \"assignerOrgId\": \"1bb62c36-49e3-4200-9d77-64a1400537cc\", \"datePublished\": \"2025-02-26T03:07:48.855Z\", \"assignerShortName\": \"Go\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.