CVE-2026-41514 OP-TEE: RSA-OAEP padding oracle in Hisilicon HPRE driver enables plaintext recovery

Low 2.5 Published 6 Jul 2026 Updated 7 Jul 2026

An attacker can recover RSA-OAEP plaintext via a padding oracle in the Hisilicon HPRE driver, affecting OP-TEE on specific hardware.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-41514?

CVE-2026-41514 is a low-severity vulnerability in OP-TEE optee_os, published on 6 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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-OAEP 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 Manger-style padding oracle that allows an attacker to recover RSA-OAEP plaintext with approximately 1000-2000 adaptive chosen ciphertext queries. Only affects plat-d06 with `CFG_HISILICON_ACC_V3=y`, which seems to be disabled by default. Version 4.11.0 contains a patch. As a workaround, disable Hisilicon HPRE RSA driver with `CFG_HISILICON_ACC_V3=n`.

Weakness: CWE-208

Which versions are affected by CVE-2026-41514?

It affects 1 product.

Products include Trustedfirmware Op-Tee.

How do I fix CVE-2026-41514?

No fix has been published for CVE-2026-41514 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-41514 being exploited?

There is no known exploitation of CVE-2026-41514 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2026-41514, GHSA-qw4r-9wj9-q23r, UBUNTU-CVE-2026-41514.