CVE-2026-42767 (GCVE-0-2026-42767)

Vulnerability from cvelistv5 – Published: 2026-06-09 16:03 – Updated: 2026-06-10 07:48
VLAI
Title
NULL Pointer Dereference in CRMF EncryptedValue Decryption
Summary
Issue summary: An attacker-controlled CMP (Certificate Management Protocol) server could trigger a NULL pointer dereference in a CMP client application. Impact summary: A NULL pointer dereference causes a crash of the application and a Denial of Service. An attacker controlling a CMP server (or acting as a man-in-the-middle) could craft a CMP response containing a CRMF (Certificate Request Message Format) CertRepMessage with an EncryptedValue structure where the symmAlg field has an algorithm OID but no parameters field. When the OpenSSL CMP client processes this response, the NULL dereference occurs, causing a crash of the CMP client. Applications that process untrusted CMP/CRMF messages may be affected. The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
OpenSSL OpenSSL Affected: 4.0.0 , < 4.0.1 (semver)
Affected: 3.6.0 , < 3.6.3 (semver)
Affected: 3.5.0 , < 3.5.7 (semver)
Affected: 3.4.0 , < 3.4.6 (semver)
Affected: 3.0.0 , < 3.0.21 (semver)
Create a notification for this product.
Date Public
2026-06-09 14:00
Credits
Zhanpeng Liu (Tencent Xuanwu Lab) Guannan Wang (Tencent Xuanwu Lab) Guancheng Li (Tencent Xuanwu Lab) Bhabani Sankar Das Igor Ustinov Tomáš Mráz
Show details on NVD website
To clipboard 

{
  "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-42767",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-09T19:44:35.594012Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-09T19:45:04.422Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "OpenSSL",
          "vendor": "OpenSSL",
          "versions": [
            {
              "lessThan": "4.0.1",
              "status": "affected",
              "version": "4.0.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.6.3",
              "status": "affected",
              "version": "3.6.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.5.7",
              "status": "affected",
              "version": "3.5.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.4.6",
              "status": "affected",
              "version": "3.4.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.0.21",
              "status": "affected",
              "version": "3.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Zhanpeng Liu (Tencent Xuanwu Lab)"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "Guannan Wang (Tencent Xuanwu Lab)"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "Guancheng Li (Tencent Xuanwu Lab)"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "Bhabani Sankar Das"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Igor Ustinov"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Tom\u00e1\u0161 Mr\u00e1z"
        }
      ],
      "datePublic": "2026-06-09T14:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Issue summary: An attacker-controlled CMP (Certificate Management Protocol)\u003cbr\u003eserver could trigger a NULL pointer dereference in a CMP client application.\u003cbr\u003e\u003cbr\u003eImpact summary: A NULL pointer dereference causes a crash of the\u003cbr\u003eapplication and a Denial of Service.\u003cbr\u003e\u003cbr\u003eAn attacker controlling a CMP server (or acting as a man-in-the-middle) could\u003cbr\u003ecraft a CMP response containing a CRMF (Certificate Request Message Format)\u003cbr\u003eCertRepMessage with an EncryptedValue structure where the symmAlg field\u003cbr\u003ehas an algorithm OID but no parameters field. When the OpenSSL CMP client\u003cbr\u003eprocesses this response, the NULL dereference occurs, causing a crash of\u003cbr\u003ethe CMP client.\u003cbr\u003e\u003cbr\u003eApplications that process untrusted CMP/CRMF messages may be affected.\u003cbr\u003e\u003cbr\u003eThe FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this\u003cbr\u003eissue, as the affected code is outside the OpenSSL FIPS module boundary."
            }
          ],
          "value": "Issue summary: An attacker-controlled CMP (Certificate Management Protocol)\nserver could trigger a NULL pointer dereference in a CMP client application.\n\nImpact summary: A NULL pointer dereference causes a crash of the\napplication and a Denial of Service.\n\nAn attacker controlling a CMP server (or acting as a man-in-the-middle) could\ncraft a CMP response containing a CRMF (Certificate Request Message Format)\nCertRepMessage with an EncryptedValue structure where the symmAlg field\nhas an algorithm OID but no parameters field. When the OpenSSL CMP client\nprocesses this response, the NULL dereference occurs, causing a crash of\nthe CMP client.\n\nApplications that process untrusted CMP/CRMF messages may be affected.\n\nThe FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this\nissue, as the affected code is outside the OpenSSL FIPS module boundary."
        }
      ],
      "metrics": [
        {
          "format": "other",
          "other": {
            "content": {
              "text": "Low"
            },
            "type": "https://openssl-library.org/policies/general/security-policy/"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-476",
              "description": "CWE-476 NULL Pointer Dereference",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-10T07:48:03.405Z",
        "orgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
        "shortName": "openssl"
      },
      "references": [
        {
          "name": "OpenSSL Advisory",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://openssl-library.org/news/secadv/20260609.txt"
        },
        {
          "name": "4.0.1 git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/b90ff3b1bd33b1c18e6a09936d097c2eddef8873"
        },
        {
          "name": "3.6.3 git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/e6f912907fc2ec82a0fd07aae55172c5e5e3d90d"
        },
        {
          "name": "3.5.7 git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/810b722f772652ad48042bcc7ab07e3414b11d0f"
        },
        {
          "name": "3.4.6 git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/665d5254083affde9982efca7c41dd01cacc8774"
        },
        {
          "name": "3.0.21 git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/61a86a8cd73546c9fea916f3d304c1293e05c046"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "NULL Pointer Dereference in CRMF EncryptedValue Decryption",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
    "assignerShortName": "openssl",
    "cveId": "CVE-2026-42767",
    "datePublished": "2026-06-09T16:03:27.435Z",
    "dateReserved": "2026-04-29T09:22:27.968Z",
    "dateUpdated": "2026-06-10T07:48:03.405Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-42767",
      "date": "2026-08-06",
      "epss": "0.00557",
      "percentile": "0.43304"
    },
    "microsoft_vex": {
      "current_release_date": "2026-06-23T14:50:32.000Z",
      "cve": "CVE-2026-42767",
      "id": "msrc_CVE-2026-42767",
      "initial_release_date": "2026-06-02T00:00:00.000Z",
      "product_status:fixed": "2",
      "product_status:known_affected": "2",
      "product_status:known_not_affected": "5",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "NULL Pointer Dereference in CRMF EncryptedValue Decryption",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-42767.json",
      "version": "4"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-42767\",\"sourceIdentifier\":\"openssl-security@openssl.org\",\"published\":\"2026-06-09T17:17:08.093\",\"lastModified\":\"2026-07-23T08:10:00.137\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Issue summary: An attacker-controlled CMP (Certificate Management Protocol)\\nserver could trigger a NULL pointer dereference in a CMP client application.\\n\\nImpact summary: A NULL pointer dereference causes a crash of the\\napplication and a Denial of Service.\\n\\nAn attacker controlling a CMP server (or acting as a man-in-the-middle) could\\ncraft a CMP response containing a CRMF (Certificate Request Message Format)\\nCertRepMessage with an EncryptedValue structure where the symmAlg field\\nhas an algorithm OID but no parameters field. When the OpenSSL CMP client\\nprocesses this response, the NULL dereference occurs, causing a crash of\\nthe CMP client.\\n\\nApplications that process untrusted CMP/CRMF messages may be affected.\\n\\nThe FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this\\nissue, as the affected code is outside the OpenSSL FIPS module boundary.\"},{\"lang\":\"es\",\"value\":\"Resumen del problema: Un servidor CMP (Certificate Management Protocol) controlado por el atacante podr\u00eda desencadenar una desreferencia de puntero NULL en una aplicaci\u00f3n cliente CMP.\\n\\nResumen del impacto: Una desreferencia de puntero NULL causa un fallo de la aplicaci\u00f3n y una denegaci\u00f3n de servicio.\\n\\nUn atacante que controla un servidor CMP (o actuando como un man-in-the-middle) podr\u00eda elaborar una respuesta CMP que contiene un CertRepMessage CRMF (Certificate Request Message Format) con una estructura EncryptedValue donde el campo symmAlg tiene un OID de algoritmo pero no un campo de par\u00e1metros. Cuando el cliente CMP de OpenSSL procesa esta respuesta, la desreferencia NULL ocurre, causando un fallo del cliente CMP.\\n\\nLas aplicaciones que procesan mensajes CMP/CRMF no confiables pueden verse afectadas.\\n\\nLos m\u00f3dulos FIPS en 4.0, 3.6, 3.5, 3.4 y 3.0 no se ven afectados por este problema, ya que el c\u00f3digo afectado est\u00e1 fuera del l\u00edmite del m\u00f3dulo FIPS de OpenSSL.\"}],\"affected\":[{\"source\":\"openssl-security@openssl.org\",\"affectedData\":[{\"vendor\":\"OpenSSL\",\"product\":\"OpenSSL\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"4.0.0\",\"lessThan\":\"4.0.1\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"3.6.0\",\"lessThan\":\"3.6.3\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"3.5.0\",\"lessThan\":\"3.5.7\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"3.4.0\",\"lessThan\":\"3.4.6\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"3.0.0\",\"lessThan\":\"3.0.21\",\"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:H/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.9,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.2,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-06-09T19:44:35.594012Z\",\"id\":\"CVE-2026-42767\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"openssl-security@openssl.org\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.0.0\",\"versionEndExcluding\":\"3.0.21\",\"matchCriteriaId\":\"EDB88756-EDFE-4886-A267-3F19342A6042\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.4.0\",\"versionEndExcluding\":\"3.4.6\",\"matchCriteriaId\":\"BF7E21E7-AEC0-4882-B1F1-2D056B506F22\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.5.0\",\"versionEndExcluding\":\"3.5.7\",\"matchCriteriaId\":\"6B6B9930-C549-4D88-9784-AF32CCDDB87A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.6.0\",\"versionEndExcluding\":\"3.6.3\",\"matchCriteriaId\":\"D41B3C45-EC73-4DC8-989D-B2E2792E102F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:openssl:openssl:4.0.0:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"6E881B9A-1A0A-4BC0-8160-20C00561167D\"}]}]}],\"references\":[{\"url\":\"https://github.com/openssl/openssl/commit/61a86a8cd73546c9fea916f3d304c1293e05c046\",\"source\":\"openssl-security@openssl.org\",\"tags\":[\"Patch\"]},{\"url\":\"https://github.com/openssl/openssl/commit/665d5254083affde9982efca7c41dd01cacc8774\",\"source\":\"openssl-security@openssl.org\",\"tags\":[\"Patch\"]},{\"url\":\"https://github.com/openssl/openssl/commit/810b722f772652ad48042bcc7ab07e3414b11d0f\",\"source\":\"openssl-security@openssl.org\",\"tags\":[\"Patch\"]},{\"url\":\"https://github.com/openssl/openssl/commit/b90ff3b1bd33b1c18e6a09936d097c2eddef8873\",\"source\":\"openssl-security@openssl.org\",\"tags\":[\"Patch\"]},{\"url\":\"https://github.com/openssl/openssl/commit/e6f912907fc2ec82a0fd07aae55172c5e5e3d90d\",\"source\":\"openssl-security@openssl.org\",\"tags\":[\"Patch\"]},{\"url\":\"https://openssl-library.org/news/secadv/20260609.txt\",\"source\":\"openssl-security@openssl.org\",\"tags\":[\"Vendor Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-07-01T09:38:17+00:00",
      "cve": "CVE-2026-42767",
      "id": "CVE-2026-42767",
      "initial_release_date": "2026-06-09T00:00:00+00:00",
      "product_status:fixed": "100",
      "product_status:known_affected": "32",
      "product_status:known_not_affected": "20",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "openssl: NULL Pointer Dereference in CRMF EncryptedValue Decryption",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42767.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-22T16:31:28Z",
      "cve": "CVE-2026-42767",
      "id": "CVE-2026-42767",
      "initial_release_date": "2026-06-13T02:19:24Z",
      "product_status:known_affected": "413",
      "product_status:known_not_affected": "383",
      "product_status:recommended": "138",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-42767",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-42767.json",
      "version": "11"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.9, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-42767\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-09T19:44:35.594012Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-06-09T19:41:44.227Z\"}}], \"cna\": {\"title\": \"NULL Pointer Dereference in CRMF EncryptedValue Decryption\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Zhanpeng Liu (Tencent Xuanwu Lab)\"}, {\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Guannan Wang (Tencent Xuanwu Lab)\"}, {\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Guancheng Li (Tencent Xuanwu Lab)\"}, {\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Bhabani Sankar Das\"}, {\"lang\": \"en\", \"type\": \"remediation developer\", \"value\": \"Igor Ustinov\"}, {\"lang\": \"en\", \"type\": \"remediation developer\", \"value\": \"Tom\\u00e1\\u0161 Mr\\u00e1z\"}], \"metrics\": [{\"other\": {\"type\": \"https://openssl-library.org/policies/general/security-policy/\", \"content\": {\"text\": \"Low\"}}, \"format\": \"other\"}], \"affected\": [{\"vendor\": \"OpenSSL\", \"product\": \"OpenSSL\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.0.0\", \"lessThan\": \"4.0.1\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.6.0\", \"lessThan\": \"3.6.3\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.5.0\", \"lessThan\": \"3.5.7\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.4.0\", \"lessThan\": \"3.4.6\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.0.0\", \"lessThan\": \"3.0.21\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2026-06-09T14:00:00.000Z\", \"references\": [{\"url\": \"https://openssl-library.org/news/secadv/20260609.txt\", \"name\": \"OpenSSL Advisory\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/b90ff3b1bd33b1c18e6a09936d097c2eddef8873\", \"name\": \"4.0.1 git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/e6f912907fc2ec82a0fd07aae55172c5e5e3d90d\", \"name\": \"3.6.3 git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/810b722f772652ad48042bcc7ab07e3414b11d0f\", \"name\": \"3.5.7 git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/665d5254083affde9982efca7c41dd01cacc8774\", \"name\": \"3.4.6 git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/61a86a8cd73546c9fea916f3d304c1293e05c046\", \"name\": \"3.0.21 git commit\", \"tags\": [\"patch\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Issue summary: An attacker-controlled CMP (Certificate Management Protocol)\\nserver could trigger a NULL pointer dereference in a CMP client application.\\n\\nImpact summary: A NULL pointer dereference causes a crash of the\\napplication and a Denial of Service.\\n\\nAn attacker controlling a CMP server (or acting as a man-in-the-middle) could\\ncraft a CMP response containing a CRMF (Certificate Request Message Format)\\nCertRepMessage with an EncryptedValue structure where the symmAlg field\\nhas an algorithm OID but no parameters field. When the OpenSSL CMP client\\nprocesses this response, the NULL dereference occurs, causing a crash of\\nthe CMP client.\\n\\nApplications that process untrusted CMP/CRMF messages may be affected.\\n\\nThe FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this\\nissue, as the affected code is outside the OpenSSL FIPS module boundary.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Issue summary: An attacker-controlled CMP (Certificate Management Protocol)\u003cbr\u003eserver could trigger a NULL pointer dereference in a CMP client application.\u003cbr\u003e\u003cbr\u003eImpact summary: A NULL pointer dereference causes a crash of the\u003cbr\u003eapplication and a Denial of Service.\u003cbr\u003e\u003cbr\u003eAn attacker controlling a CMP server (or acting as a man-in-the-middle) could\u003cbr\u003ecraft a CMP response containing a CRMF (Certificate Request Message Format)\u003cbr\u003eCertRepMessage with an EncryptedValue structure where the symmAlg field\u003cbr\u003ehas an algorithm OID but no parameters field. When the OpenSSL CMP client\u003cbr\u003eprocesses this response, the NULL dereference occurs, causing a crash of\u003cbr\u003ethe CMP client.\u003cbr\u003e\u003cbr\u003eApplications that process untrusted CMP/CRMF messages may be affected.\u003cbr\u003e\u003cbr\u003eThe FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this\u003cbr\u003eissue, as the affected code is outside the OpenSSL FIPS module boundary.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-476\", \"description\": \"CWE-476 NULL Pointer Dereference\"}]}], \"providerMetadata\": {\"orgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"shortName\": \"openssl\", \"dateUpdated\": \"2026-06-10T07:48:03.405Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-42767\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-10T07:48:03.405Z\", \"dateReserved\": \"2026-04-29T09:22:27.968Z\", \"assignerOrgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"datePublished\": \"2026-06-09T16:03:27.435Z\", \"assignerShortName\": \"openssl\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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.