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 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.

Score

CVSS 3.0 3.8 Low

Status

Analyzed - security-advisories@github.com

Published

2026-07-06

Last modified

2026-10-25

Weaknesses

CWE-190

Affected products

• Optee Os (Op-tee)
• Op-tee (Trustedfirmware)

References

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