CVE-2026-41515 — OP-TEE: RSA-OAEP padding oracle in NXP CAAM driver enables plaintext recovery

Description (CNA)

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 3.9.0 and prior to version 4.11.0, the RSA-OAEP decryption implementation in the NXP CAAM crypto driver uses non-constant-time `memcmp()` for label hash verification and has multiple distinguishable error paths. This creates a Manger-style padding oracle that allows an attacker to recover RSA-OAEP plaintext with approximately 1000-2000 adaptive chosen ciphertext queries. Version 4.11.0 contains a patch. As a workaround, disable the NXP CAAM RSA driver with `CFG_CRYPTO_DRV_RSA=n`.

Affected (CNA)

Vendor / product	Versions
OP-TEE / optee_os	affected >= 3.9.0, < 4.11.0

CWE

CWE-208

References

https://github.com/OP-TEE/optee_os/security/advisories/GHSA-5q45-58r5-cq4g

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.