{"id":"CVE-2025-47917","state":"PUBLISHED","title":"Mbed TLS before 3.6.4 allows a use-after-free in certain situations of applications that are developed in accordance with the documentation. The function mbedtls_x509_string_to_nam","description":"Mbed TLS before 3.6.4 allows a use-after-free in certain situations of applications that are developed in accordance with the documentation. The function mbedtls_x509_string_to_names() takes a head argument that is documented as an output argument. The documentation does not suggest that the function will free that pointer; however, the function does call mbedtls_asn1_free_named_data_list() on that argument, which performs a deep free(). As a result, application code that uses this function (relying only on documented behavior) is likely to still hold pointers to the memory blocks that were freed, resulting in a high risk of use-after-free or double-free. In particular, the two sample programs x509/cert_write and x509/cert_req are affected (use-after-free if the san string contains more than one DN).","publishedAt":"2025-07-20T00:00:00.000Z","updatedAt":"2025-11-03T20:04:39.638Z","severity":{"score":8.9,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:H","source":"mitre"},"assigner":"mitre","products":["Mbed mbedtls"],"affected":[{"vendor":"Mbed","product":"mbedtls","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.6.4","versionType":"custom"}]}],"references":["https://mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories/","https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2025-06-7.md","https://lists.debian.org/debian-lts-announce/2025/08/msg00025.html","https://lists.debian.org/debian-lts-announce/2025/08/msg00013.html"],"weaknesses":["CWE-416"],"ingestedAt":"2026-10-29T20:09:23.771Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/47xxx/CVE-2025-47917.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-47917","state":"PUBLISHED","datePublished":"2025-07-20T00:00:00.000Z","dateUpdated":"2025-11-03T20:04:39.638Z","assignerShortName":"mitre","assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateReserved":"2025-05-14T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"Mbed TLS before 3.6.4 allows a use-after-free in certain situations of applications that are developed in accordance with the documentation. The function mbedtls_x509_string_to_names() takes a head argument that is documented as an output argument. The documentation does not suggest that the function will free that pointer; however, the function does call mbedtls_asn1_free_named_data_list() on that argument, which performs a deep free(). As a result, application code that uses this function (relying only on documented behavior) is likely to still hold pointers to the memory blocks that were freed, resulting in a high risk of use-after-free or double-free. In particular, the two sample programs x509/cert_write and x509/cert_req are affected (use-after-free if the san string contains more than one DN)."}],"affected":[{"vendor":"Mbed","product":"mbedtls","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.6.4","versionType":"custom"}]}],"references":[{"url":"https://mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories/"},{"url":"https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2025-06-7.md"}],"metrics":[{"cvssV3_1":{"version":"3.1","baseScore":8.9,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:H"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-416","description":"CWE-416 Use After Free","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"mitre","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateUpdated":"2025-07-20T18:31:44.021Z"},"x_generator":{"engine":"enrichogram 0.0.1"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:mbed:mbedtls:*:*:*:*:*:*:*:*","versionEndExcluding":"3.6.4"}]}]}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-07-22T14:22:32.212909Z","id":"CVE-2025-47917","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-07-22T14:22:38.872Z"}},{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/08/msg00025.html"},{"url":"https://lists.debian.org/debian-lts-announce/2025/08/msg00013.html"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2025-11-03T20:04:39.638Z"}}]}}}