CVE-2026-45702OP-TEE has FF-A type confusion in SPMC tmem path that causes S-EL1 kernel panic
Updated under an hour ago ()
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It affects OP-TEE optee_os and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 4.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-843
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Jun 4, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
OP-TEE optee_os op_tee:optee_os (from the name) | from 4.3.0, < 4.11.0 | CNA record |
trustedfirmware op-tee trustedfirmware:op-tee | from 4.3.0 through 4.10.0 | NVD |
References
- https://github.com/OP-TEE/optee_os/security/advisories/GHSA-86pj-8xgw-66p5x-refsource-confirm, exploit, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.