CVE-2021-45450: Fedoraproject Fedora

High severity, CVSS 7.5. EPSS: 1.2% chance of exploitation in the next 30 days.

In Mbed TLS before 2.28.0 and 3.x before 3.1.0, psa_cipher_generate_iv and psa_cipher_encrypt allow policy bypass or oracle-based decryption when the output buffer is at memory locations accessible to an untrusted application.

Affected products

• Fedoraproject Fedora: version 36 only; version 37 only
• Trustedfirmware Mbed TLS: from 2.22.0, before 2.28.0 (fixed in 2.28.0); version 3.0.0 only

Published 2021-12-21. Last modified 2026-06-17.