CVE-2025-8194 (GCVE-0-2025-8194)
Vulnerability from cvelistv5
Published
2025-07-28 18:42
Modified
2025-11-04 22:06
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Summary
There is a defect in the CPython “tarfile” module affecting the “TarFile” extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives. This vulnerability can be mitigated by including the following patch after importing the “tarfile” module:  https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1
References
Impacted products
Vendor Product Version
Python Software Foundation CPython Version: 0
Version: 3.10.0
Version: 3.11.0
Version: 3.12.0
Version: 3.13.0
Version: 3.14.0a1
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-8194",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-07-28T18:57:54.114655Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-07-28T18:57:59.093Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-04T22:06:48.390Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/07/28/1"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/07/28/2"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "CPython",
          "repo": "https://github.com/python/cpython",
          "vendor": "Python Software Foundation",
          "versions": [
            {
              "lessThan": "3.9.24",
              "status": "affected",
              "version": "0",
              "versionType": "python"
            },
            {
              "lessThan": "3.10.19",
              "status": "affected",
              "version": "3.10.0",
              "versionType": "python"
            },
            {
              "lessThan": "3.11.14",
              "status": "affected",
              "version": "3.11.0",
              "versionType": "python"
            },
            {
              "lessThan": "3.12.12",
              "status": "affected",
              "version": "3.12.0",
              "versionType": "python"
            },
            {
              "lessThan": "3.13.6",
              "status": "affected",
              "version": "3.13.0",
              "versionType": "python"
            },
            {
              "lessThan": "3.14.0rc2",
              "status": "affected",
              "version": "3.14.0a1",
              "versionType": "python"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Alexander Urieles"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "Seth Larson"
        },
        {
          "lang": "en",
          "type": "remediation reviewer",
          "value": "Ethan Furman"
        },
        {
          "lang": "en",
          "type": "remediation reviewer",
          "value": "Steve Dower"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "There is a defect in the CPython \u201ctarfile\u201d module affecting the \u201cTarFile\u201d extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives. \u003cbr\u003e\u003cbr\u003eThis vulnerability can be mitigated by including the following patch after importing the \u201ctarfile\u201d module:\u0026nbsp;\u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1\"\u003ehttps://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1\u003c/a\u003e\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003e\u003cbr\u003e"
            }
          ],
          "value": "There is a defect in the CPython \u201ctarfile\u201d module affecting the \u201cTarFile\u201d extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives. \n\nThis vulnerability can be mitigated by including the following patch after importing the \u201ctarfile\u201d module:\u00a0 https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1"
        }
      ],
      "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"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-835",
              "description": "CWE-835 Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-09T18:38:02.590Z",
        "orgId": "28c92f92-d60d-412d-b760-e73465c3df22",
        "shortName": "PSF"
      },
      "references": [
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/python/cpython/issues/130577"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/pull/137027"
        },
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/ZULLF3IZ726XP5EY7XJ7YIN3K5MDYR2D/"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/7040aa54f14676938970e10c5f74ea93cd56aa38"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/cdae923ffe187d6ef916c0f665a31249619193fe"
        },
        {
          "tags": [
            "mitigation"
          ],
          "url": "https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/c9d9f78feb1467e73fd29356c040bde1c104f29f"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/fbc2a0ca9ac8aff6887f8ddf79b87b4510277227"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/57f5981d6260ed21266e0c26951b8564cc252bc2"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/73f03e4808206f71eb6b92c579505a220942ef19"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/b4ec17488eedec36d3c05fec127df71c0071f6cb"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Tarfile infinite loop during parsing with negative member offset",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "28c92f92-d60d-412d-b760-e73465c3df22",
    "assignerShortName": "PSF",
    "cveId": "CVE-2025-8194",
    "datePublished": "2025-07-28T18:42:44.847Z",
    "dateReserved": "2025-07-25T14:05:55.899Z",
    "dateUpdated": "2025-11-04T22:06:48.390Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-8194\",\"sourceIdentifier\":\"cna@python.org\",\"published\":\"2025-07-28T19:15:43.793\",\"lastModified\":\"2025-11-04T22:16:44.687\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"There is a defect in the CPython \u201ctarfile\u201d module affecting the \u201cTarFile\u201d extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives. \\n\\nThis vulnerability can be mitigated by including the following patch after importing the \u201ctarfile\u201d module:\u00a0 https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1\"},{\"lang\":\"es\",\"value\":\"Existe un defecto en el m\u00f3dulo \\\"tarfile\\\" de CPython que afecta a las API de extracci\u00f3n y enumeraci\u00f3n de entradas de \\\"TarFile\\\". La implementaci\u00f3n de tar procesaba archivos tar con desplazamientos negativos sin errores, lo que resultaba en un bucle infinito y un bloqueo durante el an\u00e1lisis de archivos tar manipulados con fines maliciosos. Esta vulnerabilidad se puede mitigar incluyendo el siguiente parche despu\u00e9s de importar el m\u00f3dulo \\\"tarfile\\\": import tarfile def _block_patched(self, count):     if count \u0026lt; 0: # pragma: no cover         raise tarfile.InvalidHeaderError(\\\"invalid offset\\\")     return _block_patched._orig_block(self, count) _block_patched._orig_block = tarfile.TarInfo._block tarfile.TarInfo._block = _block_patched\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"cna@python.org\",\"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}]},\"weaknesses\":[{\"source\":\"cna@python.org\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-835\"}]}],\"references\":[{\"url\":\"https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/commit/57f5981d6260ed21266e0c26951b8564cc252bc2\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/commit/7040aa54f14676938970e10c5f74ea93cd56aa38\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/commit/73f03e4808206f71eb6b92c579505a220942ef19\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/commit/b4ec17488eedec36d3c05fec127df71c0071f6cb\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/commit/c9d9f78feb1467e73fd29356c040bde1c104f29f\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/commit/cdae923ffe187d6ef916c0f665a31249619193fe\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/commit/fbc2a0ca9ac8aff6887f8ddf79b87b4510277227\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/issues/130577\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/pull/137027\",\"source\":\"cna@python.org\"},{\"url\":\"https://mail.python.org/archives/list/security-announce@python.org/thread/ZULLF3IZ726XP5EY7XJ7YIN3K5MDYR2D/\",\"source\":\"cna@python.org\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2025/07/28/1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2025/07/28/2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"http://www.openwall.com/lists/oss-security/2025/07/28/1\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2025/07/28/2\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-04T22:06:48.390Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-8194\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-07-28T18:57:54.114655Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-07-28T18:57:56.132Z\"}}], \"cna\": {\"title\": \"Tarfile infinite loop during parsing with negative member offset\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Alexander Urieles\"}, {\"lang\": \"en\", \"type\": \"coordinator\", \"value\": \"Seth Larson\"}, {\"lang\": \"en\", \"type\": \"remediation reviewer\", \"value\": \"Ethan Furman\"}, {\"lang\": \"en\", \"type\": \"remediation reviewer\", \"value\": \"Steve Dower\"}], \"metrics\": [{\"format\": \"CVSS\", \"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\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"repo\": \"https://github.com/python/cpython\", \"vendor\": \"Python Software Foundation\", \"product\": \"CPython\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"3.9.24\", \"versionType\": \"python\"}, {\"status\": \"affected\", \"version\": \"3.10.0\", \"lessThan\": \"3.10.19\", \"versionType\": \"python\"}, {\"status\": \"affected\", \"version\": \"3.11.0\", \"lessThan\": \"3.11.14\", \"versionType\": \"python\"}, {\"status\": \"affected\", \"version\": \"3.12.0\", \"lessThan\": \"3.12.12\", \"versionType\": \"python\"}, {\"status\": \"affected\", \"version\": \"3.13.0\", \"lessThan\": \"3.13.6\", \"versionType\": \"python\"}, {\"status\": \"affected\", \"version\": \"3.14.0a1\", \"lessThan\": \"3.14.0rc2\", \"versionType\": \"python\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://github.com/python/cpython/issues/130577\", \"tags\": [\"issue-tracking\"]}, {\"url\": \"https://github.com/python/cpython/pull/137027\", \"tags\": [\"patch\"]}, {\"url\": \"https://mail.python.org/archives/list/security-announce@python.org/thread/ZULLF3IZ726XP5EY7XJ7YIN3K5MDYR2D/\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://github.com/python/cpython/commit/7040aa54f14676938970e10c5f74ea93cd56aa38\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/python/cpython/commit/cdae923ffe187d6ef916c0f665a31249619193fe\", \"tags\": [\"patch\"]}, {\"url\": \"https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1\", \"tags\": [\"mitigation\"]}, {\"url\": \"https://github.com/python/cpython/commit/c9d9f78feb1467e73fd29356c040bde1c104f29f\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/python/cpython/commit/fbc2a0ca9ac8aff6887f8ddf79b87b4510277227\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/python/cpython/commit/57f5981d6260ed21266e0c26951b8564cc252bc2\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/python/cpython/commit/73f03e4808206f71eb6b92c579505a220942ef19\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/python/cpython/commit/b4ec17488eedec36d3c05fec127df71c0071f6cb\", \"tags\": [\"patch\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"There is a defect in the CPython \\u201ctarfile\\u201d module affecting the \\u201cTarFile\\u201d extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives. \\n\\nThis vulnerability can be mitigated by including the following patch after importing the \\u201ctarfile\\u201d module:\\u00a0 https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"There is a defect in the CPython \\u201ctarfile\\u201d module affecting the \\u201cTarFile\\u201d extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives. \u003cbr\u003e\u003cbr\u003eThis vulnerability can be mitigated by including the following patch after importing the \\u201ctarfile\\u201d module:\u0026nbsp;\u003ca target=\\\"_blank\\\" rel=\\\"nofollow\\\" href=\\\"https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1\\\"\u003ehttps://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1\u003c/a\u003e\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003e\u003cbr\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-835\", \"description\": \"CWE-835 Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"28c92f92-d60d-412d-b760-e73465c3df22\", \"shortName\": \"PSF\", \"dateUpdated\": \"2025-10-09T18:38:02.590Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-8194\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-04T22:06:48.390Z\", \"dateReserved\": \"2025-07-25T14:05:55.899Z\", \"assignerOrgId\": \"28c92f92-d60d-412d-b760-e73465c3df22\", \"datePublished\": \"2025-07-28T18:42:44.847Z\", \"assignerShortName\": \"PSF\"}",
      "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.