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

Quick assessment

Affected
OP-TEE optee_os
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OP-TEE optee_os是OP-TEE的安全操作系统。 OP-TEE optee_os 4.5.0版本至4.11.0之前版本存在日志信息泄露漏洞，该漏洞源于Hisilicon HPRE加密驱动程序中RSA-OAEP解密实现使用非常量时间memcmp进行标签哈希验证，并且存在多个可区分的错误路径，形成香草填充预言机攻击。

CVSS 2.5 · Low EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1055 · Process Injection

Affected Version Matrix 1

VendorProduct Version RangeStatus
OP-TEE optee_os >= 4.5.0, < 4.11.0 affected
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I. Basic Information for CVE-2026-41514

Vulnerability Information
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Vulnerability Title
OP-TEE: RSA-OAEP padding oracle in Hisilicon HPRE driver enables plaintext recovery
Source: CVE Program / CVE List V5
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-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`.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过时间差异性导致的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
OP-TEE optee_os 侧信道信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OP-TEE optee_os是OP-TEE的安全操作系统。 OP-TEE optee_os 4.5.0版本至4.11.0之前版本存在日志信息泄露漏洞，该漏洞源于Hisilicon HPRE加密驱动程序中RSA-OAEP解密实现使用非常量时间memcmp进行标签哈希验证，并且存在多个可区分的错误路径，形成香草填充预言机攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OP-TEE optee_os >= 4.5.0, < 4.11.0 -

II. Public POCs for CVE-2026-41514

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III. Intelligence Information for CVE-2026-41514

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Vendor Advisories for CVE-2026-41514 (1)

Same Patch Batch · OP-TEE · 2026-07-06 · 8 CVEs total

CVE-2026-40257 5.5 MEDIUM OP-TEE has SHA-3 accelerated finalize heap overflow
CVE-2026-44362 5.5 MEDIUM OP-TEE's subkey rollback protection can be bypassed with older subkey versions
CVE-2026-42546 3.8 LOW OP-TEE has missing OPTEE_MSG_ATTR_TYPE_MASK in cleanup_shm_refs() leaks mobj references
CVE-2026-41434 3.3 LOW OP-TEE has unbounded recursion in sanitize_client_object()
CVE-2026-41516 2.5 LOW OP-TEE: Hisilicon HPRE PKCS#1 v1.5 Decryption Padding Oracle
CVE-2026-41515 2.5 LOW OP-TEE: RSA-OAEP padding oracle in NXP CAAM driver enables plaintext recovery
CVE-2026-53763 OP-TEE has AES-GCM 32-bit integer overflow in length counters that breaks authentication g

IV. Related Vulnerabilities

Same product: optee_os
Same vendor: OP-TEE
Same weakness: CWE-208

V. Comments for CVE-2026-41514

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