CVE-2026-41515OP-TEE: RSA-OAEP padding oracle in NXP CAAM driver enables plaintext recovery
Description
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`.
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| OP-TEE | optee_os | >= 3.9.0, < 4.11.0 | |
| trustedfirmware | op-tee | 3.9.0 – ≤ 4.10.0 |
References and patches
- https://github.com/OP-TEE/optee_os/security/advisories/GHSA-5q45-58r5-cq4g MitigationVendor AdvisoryPatch
CPE matches (NVD) (1)
cpe:2.3:o:trustedfirmware:op-tee:*:*:*:*:*:*:*:*≥ 3.9.0 ≤ 4.10.0