Vulnerability 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 4.5.0 and prior to version 4.11.0, the RSA PKCS#1 v1.5 decryption implementation in the Hisilicon HPRE crypto driver uses non-constant-time `memcmp()` for label hash verification and has multiple distinguishable error paths. This creates a Bleichenbacher-style padding oracle that allows an attacker to recover RSA PKCS#1 v1.5 plaintext. Version 4.11.0 contains a patch. As a workaround, disable Hisilicon HPRE RSA driver with `CFG_HISILICON_ACC_V3=n`.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Trustedfirmware | Op-Tee | >= 4.5.0, <= 4.10.0 |
Related Weaknesses (CWE)
References
- https://github.com/OP-TEE/optee_os/security/advisories/GHSA-wxp6-8wwr-h4gfMitigationVendor AdvisoryExploit
FAQ
What is CVE-2026-41516?
CVE-2026-41516 is a vulnerability with a CVSS score of 2.5 (LOW). 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 4.5.0 and prior to...
How severe is CVE-2026-41516?
CVE-2026-41516 has been rated LOW with a CVSS base score of 2.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-41516?
Check the references section above for vendor advisories and patch information. Affected products include: Trustedfirmware Op-Tee.