CVE-2026-45702 — OP-TEE has FF-A type confusion in SPMC tmem path that causes S-EL1 kernel panic

CVE-2026-45702

OP-TEE has FF-A type confusion in SPMC tmem path that causes S-EL1 kernel panic PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
OP-TEE / optee_os	affected >= 4.3.0, < 4.11.0

CWE

CWE-843

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.