Timing Attack Affecting armmbed/mbedtls package, versions [,3.6.5)
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-UNMANAGED-ARMMBEDMBEDTLS-13654003
- published22 Oct 2025
- disclosed21 Oct 2025
- creditBeat Heeb
Introduced: 21 Oct 2025
NewCVE-2025-59438 (opens in a new tab)How to fix?
Upgrade armmbed/mbedtls to version 3.6.5 or higher.
Overview
Affected versions of this package are vulnerable to Timing Attack via discrepancies in processing invalid padding errors in legacy API (mbedtls_cipher_crypt() and mbedtls_cipher_finish() functions) and in the PSA Crypto API (psa_cipher_decrypt() and psa_cipher_finish() functions) when handling any other padding than NONE. An attacker can infer sensitive information by measuring the time taken to process cryptographic operations.