CVE-2026-41516 | OP-TEE is a Trusted Execution Environment (TEE) designed as … | CVSS 2.5 LOW

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`.

Metadata

CVE ID: CVE-2026-41516
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-04-20 18:18 UTC
Published: 2026-07-06 19:27 UTC
Last updated: 2026-07-06 19:47 UTC
Primary CWE: CWE-208
CWE-208: Observable Timing Discrepancy
Vendor / Product: OP-TEE / optee_os
Sources: cve.org · NVD

Severity & Metrics

2.5 LOW CVSS 3.1

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
OP-TEE	optee_os	—	>= 4.5.0, < 4.11.0

Weakness (CWE)

CWE	Source	Description
CWE-208	cna	CWE-208: Observable Timing Discrepancy

CVSS scores (1)

Score	Severity	Version	Source	Vector
2.5	LOW	3.1	cna	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

References (1)

https://github.com/OP-TEE/optee_os/security/advisories/GHSA-wxp6-8wwr-h4gf https://github.com/OP-TEE/optee_os/security/advisories/GHSA-wxp6-8wwr-h4gf