CVE-2026-45702
OP-TEE has FF-A type confusion in SPMC tmem path that causes S-EL1 kernel panic
CVSS Score
4.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-843 |
| Vendor | op-tee |
| Product | optee_os |
| Published | Jun 3, 2026 |
| Last Updated | Jun 4, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
OP-TEE / optee_os
>= 4.3.0, < 4.11.0