Description
An issue was discovered in Mbed TLS before 2.28.9 and 3.x before 3.6.1, in which the user-selected algorithm is not used. Unlike previously documented, enabling MBEDTLS_PSA_HMAC_DRBG_MD_TYPE does not cause the PSA subsystem to use HMAC_DRBG: it uses HMAC_DRBG only when MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG and MBEDTLS_CTR_DRBG_C are disabled.
References (3)
Core 3
Core References
Release Notes
https://github.com/Mbed-TLS/mbedtls/releases/
Vendor Advisory
https://mbed-tls.readthedocs.io/en/latest/security-advisories/
Scores
CVSS v3
5.1
EPSS
0.0013
EPSS Percentile
31.1%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-696
Status
published
Products (1)
arm/mbed_tls
2.26.0 - 2.28.9
Published
Sep 05, 2024
Tracked Since
Feb 18, 2026