CVE-2026-45702
OP-TEE has FF-A type confusion in SPMC tmem path that causes S-EL1 kernel panic
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.
INFO
Published Date :
June 3, 2026, 7:16 p.m.
Last Modified :
June 5, 2026, 8:13 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update OP-TEE to version 4.11.0 or later.
- Ensure proper configuration of OP-TEE as an SPMC.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-45702.
| URL | Resource |
|---|---|
| https://github.com/OP-TEE/optee_os/security/advisories/GHSA-86pj-8xgw-66p5 | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-45702 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-45702
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-45702 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-45702 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CPE Deprecation Remap by [email protected]
Jun. 05, 2026
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:o:linaro:op-tee:*:*:*:*:*:*:*:* versions from (including) 4.3.0 from (including) 4.10.0 OR *cpe:2.3:o:trustedfirmware:op-tee:*:*:*:*:*:*:*:* versions from (including) 4.3.0 from (including) 4.10.0 -
Initial Analysis by [email protected]
Jun. 05, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CPE Configuration OR *cpe:2.3:o:linaro:op-tee:*:*:*:*:*:*:*:* versions from (including) 4.3.0 up to (including) 4.10.0 Added Reference Type GitHub, Inc.: https://github.com/OP-TEE/optee_os/security/advisories/GHSA-86pj-8xgw-66p5 Types: Exploit, Vendor Advisory -
New CVE Received by [email protected]
Jun. 03, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-843 Added Reference https://github.com/OP-TEE/optee_os/security/advisories/GHSA-86pj-8xgw-66p5