CVE-2026-45702 Details
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.
A type confusion vulnerability has been identified in OP-TEE OS versions 4.3.0 prior to 4.11.0. This vulnerability occurs when OP-TEE is configured as a Secure Partition Manager (SPMC) for Secure EL0 Service Partitions, with the options 'CFG_CORE_SEL1_SPMC' and 'CFG_SECURE_PARTITION' enabled. The issue arises while processing an FFA_MEM_SHARE request from the normal world, where a dynamically allocated buffer is incorrectly passed as a 'struct ffa_rxtx' pointer. This misallocation allows an attacker in the EL1 Normal World to control the memory addresses accessed by OP-TEE, potentially leading to a crash of the secure world kernel and disrupting normal world hypervisors and other guests.
Users can upgrade to OP-TEE version 4.11.0 or later to address this vulnerability. For those using version 4.11.0, the patch '0001-core-ffa-deny-dynamic-memory-sharing-to-S-EL0-SPs.patch' is available.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jun 4, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/OP-TEE/optee_os/security/advisories/GHSA-86pj-8xgw-66p5 | [email protected] | ExploitVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-843 | Access of Resource Using Incompatible Type ('Type Confusion') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| trustedfirmware op-tee | >= 4.3.0, <= 4.10.0 |
CPE
Remediation
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Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 22, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 5, 2026 | CPE Deprecation Remap | [email protected] |
| Jun 5, 2026 | Initial Analysis | [email protected] |
| Jun 3, 2026 | New CVE Received | [email protected] |