CVE WatchJul 7, 2026

CVE-2026-53763

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

CVSS

3.8

Low

EPSS

0.1%

KEV

—

Exploit Today

0-100

Published: Jul 6, 2026 · Last modified: Jul 7, 2026 · CWE-190

EPSS · 30d

0.1%EPSS · 30 days0.1%

2026-07-072026-07-17

Technical 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 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.

Official references

github.comhttps://github.com/OP-TEE/optee_os/security/advisories/GHSA-fcm8-vjhf-6vqh

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