CVE-2025-47917 (GCVE-0-2025-47917)

Vulnerability from cvelistv5 – Published: 2025-07-20 00:00 – Updated: 2025-11-03 20:04
VLAI?
Summary
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).
Severity ?
8.9 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Mbed mbedtls Affected: 0 , < 3.6.4 (custom)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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