CVE-2026-45702CWE-843

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

Medium · published June 3, 2026

CVSS v3.1
4.4
EPSS
0%
Percentile
5.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.4 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00165 · 5.4th percentile
Weakness
CWE-843 · Access of Resource Using Incompatible Type ('Type Confusion')
Published
2026-06-03T17:55Z
EPSS history
Timeline
  • 03 JUN 17:55Z
    OP-TEE has FF-A type confusion in SPMC tmem path that causes S-EL1 kernel panic
    cvelistv5