CVE-2026-45702

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.

Score

CVSS 3.1 5.5 Medium

Status

Analyzed - security-advisories@github.com

Published

2026-06-03

Last modified

2026-06-04

Weaknesses

CWE-843

Affected products

• Optee Os (Op-tee)
• Op-tee (Trustedfirmware)

References

• https://github.com/OP-TEE/optee_os/security/advisories/GHSA-86pj-8xgw-66p5