CVE-2026-45702

MEDIUM

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

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 4.4
EPSS 0.0012
EPSS Percentile 2.0%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-843
Status published
Products (2)
OP-TEE/optee_os >= 4.3.0, < 4.11.0
trustedfirmware/op-tee 4.3.0 - 4.10.0
Published Jun 03, 2026
Tracked Since Jun 04, 2026