CVE-2026-33662
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk34th percentile - higher than 34% of all known CVEs
Summary
OP-TEE to środowisko zaufane (TEE) zaprojektowane jako towarzyszące dla niesecure'nego jądra Linux działającego na rdzeniach Arm Cortex-A. W wersjach od 3.8.0 do 4.10, w funkcji emsa_pkcs1_v1_5_encode(), obliczanie rozmiaru paddingu może prowadzić do przepełnienia, co skutkuje awarią OP-TEE.
Risk Assessment
Podatność ta może prowadzić do awarii systemu OP-TEE na platformach z przyspieszeniem RSA, co może wpłynąć na bezpieczeństwo aplikacji korzystających z tego środowiska.
Recommendation
Zaleca się aktualizację OP-TEE do wersji nowszej niż 4.10, aby zniwelować ryzyko związane z tą podatnością.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

