CVE-2026-53763: Trustedfirmware Op-Tee

Low severity, CVSS 3.8. EPSS: 0.2% chance of exploitation in the next 30 days.

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 3.0.0 and prior to version 4.11.0, 32-bit integer overflows in OP-TEE core's AES-GCM implementation cause the authentication tag to be computed with incorrect bit-length values after processing more than 512 megabytes of payload or Additional Authenticated Data (AAD). Version 4.11.0 contains a patch. No known workarounds are available.

Affected products

• Trustedfirmware Op-Tee: from 3.0.0, up to and including 4.10.0

Published 2026-07-06. Last modified 2026-07-07.