CVE-2026-33662

The record

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.

Affected packages

Related vulnerabilities

• CVE-2026-110264 An issue has been discovered in GitLab CE/EE affecting all versions from 7.0 before… CWE-190
• CVE-2026-53615 util-linux is a random collection of Linux utilities. CWE-190
• CVE-2026-106574 ImageMagick is free and open-source software used for editing and manipulating digital… CWE-190
• CVE-2026-106571 ImageMagick is free and open-source software used for editing and manipulating digital… CWE-190
• CVE-2026-75820 GNU Aspell contains an integer truncation vulnerability in the WritableDict::add()… CWE-190
• CVE-2026-102621 A vulnerability was identified in Freedesktop Poppler up to 26.08.0. CWE-190
• CVE-2026-102620 A vulnerability was determined in Freedesktop Poppler 26.06.0/26.07.0/26.08.0. CWE-190
• CVE-2026-102633 libexpat versions 2.7.2 through 2.8.5 contain an integer overflow vulnerability in… CWE-190