4.4Medium
CVE-2026-45702OP-TEE has FF-A type confusion in SPMC tmem path that causes S-EL1 kernel panic
Description
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.
Weakness (CWE):
CWE-843
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| OP-TEE | optee_os | >= 4.3.0, < 4.11.0 | |
| trustedfirmware | op-tee | 4.3.0 – ≤ 4.10.0 |
References and patches
- https://github.com/OP-TEE/optee_os/security/advisories/GHSA-86pj-8xgw-66p5 ExploitVendor Advisory
CPE matches (NVD) (1)
cpe:2.3:o:trustedfirmware:op-tee:*:*:*:*:*:*:*:*≥ 4.3.0 ≤ 4.10.0