Off-by-one Error Affecting mbedtls package, versions [,3.6.4)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CONAN-MBEDTLS-10645570
- published8 Jul 2025
- disclosed4 Jul 2025
- creditLinh Le, Ngan Nguyen
Introduced: 4 Jul 2025
NewCVE-2025-52497 (opens in a new tab)How to fix?
Upgrade mbedtls to version 3.6.4 or higher.
Overview
Affected versions of this package are vulnerable to Off-by-one Error via the mbedtls_pem_read_buffer, mbedtls_pk_parse and mbedtls_pk_parse_keyfile() functions when processing untrusted PEM input. An attacker can cause a one-byte heap-based buffer underflow by supplying specially crafted PEM data.
Note:
Applications are only affected if they process untrusted PEM-encrypted material (that is, if they call one of the above functions with a non-NULL password argument and untrusted PEM input).
Applications built with MBEDTLS_PEM_C disabled are not affected.