FKIE_CVE-2026-22795

Vulnerability from fkie_nvd - Published: 2026-01-27 16:16 - Updated: 2026-02-02 18:41
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Summary
Issue summary: An invalid or NULL pointer dereference can happen in an application processing a malformed PKCS#12 file. Impact summary: An application processing a malformed PKCS#12 file can be caused to dereference an invalid or NULL pointer on memory read, resulting in a Denial of Service. A type confusion vulnerability exists in PKCS#12 parsing code where an ASN1_TYPE union member is accessed without first validating the type, causing an invalid pointer read. The location is constrained to a 1-byte address space, meaning any attempted pointer manipulation can only target addresses between 0x00 and 0xFF. This range corresponds to the zero page, which is unmapped on most modern operating systems and will reliably result in a crash, leading only to a Denial of Service. Exploiting this issue also requires a user or application to process a maliciously crafted PKCS#12 file. It is uncommon to accept untrusted PKCS#12 files in applications as they are usually used to store private keys which are trusted by definition. For these reasons, the issue was assessed as Low severity. The FIPS modules in 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the PKCS12 implementation is outside the OpenSSL FIPS module boundary. OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0 and 1.1.1 are vulnerable to this issue. OpenSSL 1.0.2 is not affected by this issue.
References
openssl-security@openssl.orghttps://github.com/openssl/openssl/commit/2502e7b7d4c0cf4f972a881641fe09edc67aeec4Patch
openssl-security@openssl.orghttps://github.com/openssl/openssl/commit/572844beca95068394c916626a6d3a490f831a49Patch
openssl-security@openssl.orghttps://github.com/openssl/openssl/commit/7bbca05be55b129651d9df4bdb92becc45002c12Patch
openssl-security@openssl.orghttps://github.com/openssl/openssl/commit/eeee3cbd4d682095ed431052f00403004596373ePatch
openssl-security@openssl.orghttps://github.com/openssl/openssl/commit/ef2fb66ec571564d64d1c74a12e388a2a54d05d2Patch
openssl-security@openssl.orghttps://openssl-library.org/news/secadv/20260127.txtVendor Advisory
Impacted products
Vendor Product Version
openssl openssl *
openssl openssl *
openssl openssl *
openssl openssl *
openssl openssl *
openssl openssl *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E000B986-6A31-468F-9EA3-B9D16DB16FB2",
              "versionEndExcluding": "1.1.1ze",
              "versionStartIncluding": "1.1.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C76C5F55-5243-4461-82F5-2FEBFF4D59FA",
              "versionEndExcluding": "3.0.19",
              "versionStartIncluding": "3.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F5292E9E-6B50-409F-9219-7B0A04047AD8",
              "versionEndExcluding": "3.3.6",
              "versionStartIncluding": "3.3.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B9D3DCAE-317D-4DFB-93F0-7A235A229619",
              "versionEndExcluding": "3.4.4",
              "versionStartIncluding": "3.4.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "1CAC7CBE-EC03-4089-938A-0CEEB2E09B62",
              "versionEndExcluding": "3.5.5",
              "versionStartIncluding": "3.5.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "68352537-5E99-4F4D-B78A-BCF0353A70A5",
              "versionEndExcluding": "3.6.1",
              "versionStartIncluding": "3.6.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Issue summary: An invalid or NULL pointer dereference can happen in\nan application processing a malformed PKCS#12 file.\n\nImpact summary: An application processing a malformed PKCS#12 file can be\ncaused to dereference an invalid or NULL pointer on memory read, resulting\nin a Denial of Service.\n\nA type confusion vulnerability exists in PKCS#12 parsing code where\nan ASN1_TYPE union member is accessed without first validating the type,\ncausing an invalid pointer read.\n\nThe location is constrained to a 1-byte address space, meaning any\nattempted pointer manipulation can only target addresses between 0x00 and 0xFF.\nThis range corresponds to the zero page, which is unmapped on most modern\noperating systems and will reliably result in a crash, leading only to a\nDenial of Service. Exploiting this issue also requires a user or application\nto process a maliciously crafted PKCS#12 file. It is uncommon to accept\nuntrusted PKCS#12 files in applications as they are usually used to store\nprivate keys which are trusted by definition. For these reasons, the issue\nwas assessed as Low severity.\n\nThe FIPS modules in 3.5, 3.4, 3.3 and 3.0 are not affected by this issue,\nas the PKCS12 implementation is outside the OpenSSL FIPS module boundary.\n\nOpenSSL 3.6, 3.5, 3.4, 3.3, 3.0 and 1.1.1 are vulnerable to this issue.\n\nOpenSSL 1.0.2 is not affected by this issue."
    },
    {
      "lang": "es",
      "value": "Resumen del problema: Puede producirse una desreferencia de puntero inv\u00e1lido o NULL en una aplicaci\u00f3n que procesa un archivo PKCS#12 malformado.\n\nResumen del impacto: Una aplicaci\u00f3n que procesa un archivo PKCS#12 malformado puede ser inducida a desreferenciar un puntero inv\u00e1lido o NULL en una lectura de memoria, resultando en una denegaci\u00f3n de servicio.\n\nExiste una vulnerabilidad de confusi\u00f3n de tipos en el c\u00f3digo de an\u00e1lisis de PKCS#12 donde se accede a un miembro de la uni\u00f3n ASN1_TYPE sin validar primero el tipo, causando una lectura de puntero inv\u00e1lido.\n\nLa ubicaci\u00f3n est\u00e1 restringida a un espacio de direcciones de 1 byte, lo que significa que cualquier intento de manipulaci\u00f3n de puntero solo puede apuntar a direcciones entre 0x00 y 0xFF. Este rango corresponde a la p\u00e1gina cero, que no est\u00e1 mapeada en la mayor\u00eda de los sistemas operativos modernos y resultar\u00e1 de forma fiable en un fallo, lo que lleva solo a una denegaci\u00f3n de servicio. Para explotar este problema tambi\u00e9n es preciso que un usuario o aplicaci\u00f3n procese un archivo PKCS#12 creado maliciosamente. Es poco com\u00fan aceptar archivos PKCS#12 no confiables en aplicaciones, ya que generalmente se utilizan para almacenar claves privadas que son confiables por definici\u00f3n. Por estas razones, el problema fue evaluado como de baja severidad.\n\nLos m\u00f3dulos FIPS en 3.5, 3.4, 3.3 y 3.0 no se ven afectados por este problema, ya que la implementaci\u00f3n de PKCS12 est\u00e1 fuera del l\u00edmite del m\u00f3dulo FIPS de OpenSSL.\n\nOpenSSL 3.6, 3.5, 3.4, 3.3, 3.0 y 1.1.1 son vulnerables a este problema.\n\nOpenSSL 1.0.2 no se ve afectado por este problema."
    }
  ],
  "id": "CVE-2026-22795",
  "lastModified": "2026-02-02T18:41:14.917",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-01-27T16:16:35.430",
  "references": [
    {
      "source": "openssl-security@openssl.org",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/openssl/openssl/commit/2502e7b7d4c0cf4f972a881641fe09edc67aeec4"
    },
    {
      "source": "openssl-security@openssl.org",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/openssl/openssl/commit/572844beca95068394c916626a6d3a490f831a49"
    },
    {
      "source": "openssl-security@openssl.org",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/openssl/openssl/commit/7bbca05be55b129651d9df4bdb92becc45002c12"
    },
    {
      "source": "openssl-security@openssl.org",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/openssl/openssl/commit/eeee3cbd4d682095ed431052f00403004596373e"
    },
    {
      "source": "openssl-security@openssl.org",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/openssl/openssl/commit/ef2fb66ec571564d64d1c74a12e388a2a54d05d2"
    },
    {
      "source": "openssl-security@openssl.org",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://openssl-library.org/news/secadv/20260127.txt"
    }
  ],
  "sourceIdentifier": "openssl-security@openssl.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-754"
        }
      ],
      "source": "openssl-security@openssl.org",
      "type": "Secondary"
    }
  ]
}


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Sightings

Author Source Type Date

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.