CVE-2026-22795 (GCVE-0-2026-22795)
Vulnerability from cvelistv5
Published
2026-01-27 16:01
Modified
2026-01-29 18:13
Severity ?
CWE
  • CWE-754 - Improper Check for Unusual or Exceptional Conditions
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
Impacted products
Vendor Product Version
OpenSSL OpenSSL Version: 3.6.0   ≤
Version: 3.5.0   ≤
Version: 3.4.0   ≤
Version: 3.3.0   ≤
Version: 3.0.0   ≤
Version: 1.1.1   < 1.1.1ze
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-22795",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-28T20:03:18.604129Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-29T18:13:37.371Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "OpenSSL",
          "vendor": "OpenSSL",
          "versions": [
            {
              "lessThan": "3.6.1",
              "status": "affected",
              "version": "3.6.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.5.5",
              "status": "affected",
              "version": "3.5.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.4.4",
              "status": "affected",
              "version": "3.4.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.3.6",
              "status": "affected",
              "version": "3.3.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.0.19",
              "status": "affected",
              "version": "3.0.0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.1.1ze",
              "status": "affected",
              "version": "1.1.1",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Luigino Camastra (Aisle Research)"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Bob Beck"
        }
      ],
      "datePublic": "2026-01-27T14:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Issue summary: An invalid or NULL pointer dereference can happen in\u003cbr\u003ean application processing a malformed PKCS#12 file.\u003cbr\u003e\u003cbr\u003eImpact summary: An application processing a malformed PKCS#12 file can be\u003cbr\u003ecaused to dereference an invalid or NULL pointer on memory read, resulting\u003cbr\u003ein a Denial of Service.\u003cbr\u003e\u003cbr\u003eA type confusion vulnerability exists in PKCS#12 parsing code where\u003cbr\u003ean ASN1_TYPE union member is accessed without first validating the type,\u003cbr\u003ecausing an invalid pointer read.\u003cbr\u003e\u003cbr\u003eThe location is constrained to a 1-byte address space, meaning any\u003cbr\u003eattempted pointer manipulation can only target addresses between 0x00 and 0xFF.\u003cbr\u003eThis range corresponds to the zero page, which is unmapped on most modern\u003cbr\u003eoperating systems and will reliably result in a crash, leading only to a\u003cbr\u003eDenial of Service. Exploiting this issue also requires a user or application\u003cbr\u003eto process a maliciously crafted PKCS#12 file. It is uncommon to accept\u003cbr\u003euntrusted PKCS#12 files in applications as they are usually used to store\u003cbr\u003eprivate keys which are trusted by definition. For these reasons, the issue\u003cbr\u003ewas assessed as Low severity.\u003cbr\u003e\u003cbr\u003eThe FIPS modules in 3.5, 3.4, 3.3 and 3.0 are not affected by this issue,\u003cbr\u003eas the PKCS12 implementation is outside the OpenSSL FIPS module boundary.\u003cbr\u003e\u003cbr\u003eOpenSSL 3.6, 3.5, 3.4, 3.3, 3.0 and 1.1.1 are vulnerable to this issue.\u003cbr\u003e\u003cbr\u003eOpenSSL 1.0.2 is not affected by this issue."
            }
          ],
          "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."
        }
      ],
      "metrics": [
        {
          "format": "other",
          "other": {
            "content": {
              "text": "Low"
            },
            "type": "https://openssl-library.org/policies/general/security-policy/"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-754",
              "description": "CWE-754 Improper Check for Unusual or Exceptional Conditions",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T16:01:27.320Z",
        "orgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
        "shortName": "openssl"
      },
      "references": [
        {
          "name": "OpenSSL Advisory",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://openssl-library.org/news/secadv/20260127.txt"
        },
        {
          "name": "3.6.1 git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/ef2fb66ec571564d64d1c74a12e388a2a54d05d2"
        },
        {
          "name": "3.5.5 git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/2502e7b7d4c0cf4f972a881641fe09edc67aeec4"
        },
        {
          "name": "3.4.4 git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/7bbca05be55b129651d9df4bdb92becc45002c12"
        },
        {
          "name": "3.3.6 git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/eeee3cbd4d682095ed431052f00403004596373e"
        },
        {
          "name": "3.0.19 git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/572844beca95068394c916626a6d3a490f831a49"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Missing ASN1_TYPE validation in PKCS#12 parsing",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
    "assignerShortName": "openssl",
    "cveId": "CVE-2026-22795",
    "datePublished": "2026-01-27T16:01:27.320Z",
    "dateReserved": "2026-01-09T18:54:13.570Z",
    "dateUpdated": "2026-01-29T18:13:37.371Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"REQUIRED\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-22795\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-28T20:03:18.604129Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-28T20:03:22.912Z\"}}], \"cna\": {\"title\": \"Missing ASN1_TYPE validation in PKCS#12 parsing\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Luigino Camastra (Aisle Research)\"}, {\"lang\": \"en\", \"type\": \"remediation developer\", \"value\": \"Bob Beck\"}], \"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\": \"3.6.0\", \"lessThan\": \"3.6.1\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.5.0\", \"lessThan\": \"3.5.5\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.4.0\", \"lessThan\": \"3.4.4\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.3.0\", \"lessThan\": \"3.3.6\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.0.0\", \"lessThan\": \"3.0.19\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"1.1.1\", \"lessThan\": \"1.1.1ze\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2026-01-27T14:00:00.000Z\", \"references\": [{\"url\": \"https://openssl-library.org/news/secadv/20260127.txt\", \"name\": \"OpenSSL Advisory\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/ef2fb66ec571564d64d1c74a12e388a2a54d05d2\", \"name\": \"3.6.1 git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/2502e7b7d4c0cf4f972a881641fe09edc67aeec4\", \"name\": \"3.5.5 git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/7bbca05be55b129651d9df4bdb92becc45002c12\", \"name\": \"3.4.4 git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/eeee3cbd4d682095ed431052f00403004596373e\", \"name\": \"3.3.6 git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/572844beca95068394c916626a6d3a490f831a49\", \"name\": \"3.0.19 git commit\", \"tags\": [\"patch\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}, \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Issue summary: An invalid or NULL pointer dereference can happen in\u003cbr\u003ean application processing a malformed PKCS#12 file.\u003cbr\u003e\u003cbr\u003eImpact summary: An application processing a malformed PKCS#12 file can be\u003cbr\u003ecaused to dereference an invalid or NULL pointer on memory read, resulting\u003cbr\u003ein a Denial of Service.\u003cbr\u003e\u003cbr\u003eA type confusion vulnerability exists in PKCS#12 parsing code where\u003cbr\u003ean ASN1_TYPE union member is accessed without first validating the type,\u003cbr\u003ecausing an invalid pointer read.\u003cbr\u003e\u003cbr\u003eThe location is constrained to a 1-byte address space, meaning any\u003cbr\u003eattempted pointer manipulation can only target addresses between 0x00 and 0xFF.\u003cbr\u003eThis range corresponds to the zero page, which is unmapped on most modern\u003cbr\u003eoperating systems and will reliably result in a crash, leading only to a\u003cbr\u003eDenial of Service. Exploiting this issue also requires a user or application\u003cbr\u003eto process a maliciously crafted PKCS#12 file. It is uncommon to accept\u003cbr\u003euntrusted PKCS#12 files in applications as they are usually used to store\u003cbr\u003eprivate keys which are trusted by definition. For these reasons, the issue\u003cbr\u003ewas assessed as Low severity.\u003cbr\u003e\u003cbr\u003eThe FIPS modules in 3.5, 3.4, 3.3 and 3.0 are not affected by this issue,\u003cbr\u003eas the PKCS12 implementation is outside the OpenSSL FIPS module boundary.\u003cbr\u003e\u003cbr\u003eOpenSSL 3.6, 3.5, 3.4, 3.3, 3.0 and 1.1.1 are vulnerable to this issue.\u003cbr\u003e\u003cbr\u003eOpenSSL 1.0.2 is not affected by this issue.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-754\", \"description\": \"CWE-754 Improper Check for Unusual or Exceptional Conditions\"}]}], \"providerMetadata\": {\"orgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"shortName\": \"openssl\", \"dateUpdated\": \"2026-01-27T16:01:27.320Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-22795\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-29T18:13:37.371Z\", \"dateReserved\": \"2026-01-09T18:54:13.570Z\", \"assignerOrgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"datePublished\": \"2026-01-27T16:01:27.320Z\", \"assignerShortName\": \"openssl\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.