Vulnerability in Linaro Op-Tee
CVE-2026-45702
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (5.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 5.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Linaro Op-Tee
- Op-Tee Optee OS — versions >= 4.3.0, < 4.11.0
- Trustedfirmware Op-Tee
Weakness classification (CWE)
References
- github.com/OP-TEE/optee_os/security/advisories/GHSA-86pj-8xgw-66p5 (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-45702?
- CVE-2026-45702 is a medium-severity vulnerability in Linaro Op-Tee, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 4.4/10. Published 2026-06-03.
- How severe is CVE-2026-45702?
- Medium severity. CVSS v3 base score is 4.4 out of 10.