CVE-2026-40257

CVE-2026-40257 affects OP-TEE (Trusted Execution Environment) for Cortex-A with TrustZone. From versions 3.21.0 up to, but not including, 4.11.0, the ARM Crypto Extensions accelerated SHA-3 implementation has an off-by-one error that can cause a massive heap overflow, corrupting all TEE kernel me...

CVE-2026-40257 OP-TEE has SHA-3 accelerated finalize heap overflow

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 3.21.0 and prior to version 4.11.0, the ARM Crypto Extensions accelerated SHA-3 implementation has an off-by-one erro...