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

CVE ID :CVE-2026-53763

Published : July 6, 2026, 7:35 p.m. | 12 minutes ago

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.

Severity: 0.0 | NA

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