CVE-2026-45702: Trustedfirmware Op-Tee

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. Starting in version 4.3.0 and prior to version 4.11.0, a type confusion vulnerability exists in OP-TEE OS when processing an FFA_MEM_SHARE request from the normal world. This only applies when OP-TEE is configured as an SPMC for S-EL0 SPs, that is, with `CFG_CORE_SEL1_SPMC=y` and `CFG_SECURE_PARTITION=y`. Version 4.11.0 fixes the issue.

Affected products

• Trustedfirmware Op-Tee: from 4.3.0, up to and including 4.10.0

Published 2026-06-03. Last modified 2026-07-22.