CVE-2022-46392: Arm Mbed TLS

Medium severity, CVSS 5.3. EPSS: 0.8% chance of exploitation in the next 30 days.

An issue was discovered in Mbed TLS before 2.28.2 and 3.x before 3.3.0. An adversary with access to precise enough information about memory accesses (typically, an untrusted operating system attacking a secure enclave) can recover an RSA private key after observing the victim performing a single private-key operation, if the window size (MBEDTLS_MPI_WINDOW_SIZE) used for the exponentiation is 3 or smaller.

Affected products

• Arm Mbed TLS: before 2.28.2 (fixed in 2.28.2)
• Fedoraproject Fedora: version 36 only; version 37 only
• Trustedfirmware Mbed TLS: from 3.0.0, before 3.3.0 (fixed in 3.3.0)

Published 2022-12-15. Last modified 2026-06-17.