CVE-2026-53763 — OP-TEE has AES-GCM 32-bit integer overflow in length counters that breaks authentication guarantee

CVE-2026-53763

OP-TEE has AES-GCM 32-bit integer overflow in length counters that breaks authentication guarantee PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
OP-TEE / optee_os	affected >= 3.0.0, < 4.11.0

CWE

CWE-190

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.