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Arm Mbed TLS before 2.19.0 and Arm Mbed Crypto before 2.0.0, when deterministic ECDSA is enabled, use an RNG with insufficient entropy for blinding, which might allow an attacker to recover a private key via side-channel attacks if a victim signs the same message many times. (For Mbed TLS, the fix is also available in versions 2.7.12 and 2.16.3.)

🗓️ 04 Sep 2025 00:38:18Reported by MicrosoftType 
mscve
 mscve
🔗 msrc.microsoft.com👁 4 Views

Low-entropy RNG in deterministic ECDSA may leak private keys via side-channel in Arm Mbed TLS and Mbed Crypto.

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04 Sep 2025 00:38Current
7High risk
Vulners AI Score7
CVSS 22.6
CVSS 3.15.3
EPSS0.00671
4