Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

CVE-2026-33662

Gravedad CVSS v3.1:
ALTA
Tipo:
CWE-190 Desbordamiento o ajuste de enteros
Fecha de publicación:
24/04/2026
Última modificación:
28/04/2026

Descripción

*** Pendiente de traducción *** 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. From 3.8.0 to 4.10, in the function emsa_pkcs1_v1_5_encode() in core/drivers/crypto/crypto_api/acipher/rsassa.c, the amount of padding needed, "PS size", is calculated by subtracting the size of the digest and other fields required for the EMA-PKCS1-v1_5 encoding from the size of the modulus of the key. By selecting a small enough modulus, this subtraction can overflow. The padding is added as a string of 0xFF bytes with a call to memset(), and an underflowed integer will cause the memset() call to overwrite until OP-TEE crashes. This only affects platforms registering RSA acceleration.

Productos y versiones vulnerables

CPE Desde Hasta
cpe:2.3:o:linaro:op-tee:*:*:*:*:*:*:*:* 3.8.0 (incluyendo) 4.10.0 (incluyendo)


Referencias a soluciones, herramientas e información