CVE-2026-45702 | BDVDB-2026-337491 Detail

OP-TEEoptee_os

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.

Impact#

Per CVSS v3.1: confidentiality impact none, integrity impact none, availability impact high. Attack vector: local.

Weaknesses#

CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')

References#

https://github.com/OP-TEE/optee_os/security/advisories/GHSA-86pj-8xgw-66p5

Exploit#

No public exploit known

History#

Version 12026-06-03Record published in the CVE List.
Version 22026-06-04Most recent update recorded in the CVE List.

Published

Published: 2026-06-03
Last modified: 2026-06-04

Vendor information

Vendor: OP-TEE
Product: optee_os

All OP-TEE vulnerabilities

Score

4.4 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 4.7.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Type Confusion

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 4.3.0, < 4.11.0
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

4.4 Medium

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Metric breakdown
Attack Vector	Local
Attack Complexity	Low
Privileges Required	High
User Interaction	None
Scope	Unchanged
Confidentiality	None
Integrity	None
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).