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CVE-2026-71969— OP-TEE OS 4.10.0 Buffer Underwrite via RSA NOPAD Encrypt/Decrypt Operations

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 Trusted OS是OP-TEE组织的一款可信执行环境操作系统。 OP-TEE Trusted OS 4.10.0及之前版本存在缓冲区错误漏洞，该漏洞源于mbedTLS软件后端和SE050硬件驱动中RSA NOPAD加密和解密操作存在的缓冲区下溢问题，当输入长度超过RSA模数大小时，减法表达式回绕导致memcpy在目标缓冲区之前写入攻击者控制的数据，可能允许恶意Trusted Application破坏安全世界堆内存。

CVSS 6.7 · Medium EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 2

VendorProduct Version RangeStatus
OP-TEE optee_os ≤ 4.10.0 affected
7b8b494e0a324cefec8ed386b7de413b44f1aaf3 unaffected
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I. Basic Information for CVE-2026-71969

Vulnerability Information
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Vulnerability Title
OP-TEE OS 4.10.0 Buffer Underwrite via RSA NOPAD Encrypt/Decrypt Operations
Source: CVE Program / CVE List V5
Vulnerability Description
OP-TEE OS through 4.10.0, fixed in commit 7b8b494, contains a buffer underwrite vulnerability in the RSA NOPAD encrypt and decrypt operations within the mbedTLS software backend and SE050 hardware driver that allows a malicious Trusted Application to corrupt secure-world heap memory by supplying an input length exceeding the RSA modulus size. When src_len exceeds rsa_len, the subtraction expression wraps to a large unsigned value, causing a subsequent memcpy to write attacker-controlled data before the destination buffer in S-EL1 secure-world heap memory.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
OP-TEE Trusted OS 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OP-TEE Trusted OS是OP-TEE组织的一款可信执行环境操作系统。 OP-TEE Trusted OS 4.10.0及之前版本存在缓冲区错误漏洞，该漏洞源于mbedTLS软件后端和SE050硬件驱动中RSA NOPAD加密和解密操作存在的缓冲区下溢问题，当输入长度超过RSA模数大小时，减法表达式回绕导致memcpy在目标缓冲区之前写入攻击者控制的数据，可能允许恶意Trusted Application破坏安全世界堆内存。
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 0 ~ 4.10.0 -

II. Public POCs for CVE-2026-71969

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III. Intelligence Information for CVE-2026-71969

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Patches & Fixes for CVE-2026-71969 (3)

Vendor Advisories for CVE-2026-71969 (1)

Security Blog Posts for CVE-2026-71969 (1)

Same Patch Batch · OP-TEE · 2026-08-10 · 3 CVEs total

CVE-2026-71968 6.7 MEDIUM OP-TEE OS 4.10.0 Use-After-Free via Trusted Application Loader TA_FLAG_CONCURRENT
CVE-2026-71967 5.5 MEDIUM OP-TEE OS 4.10.0 NULL Pointer Dereference DoS via Widevine PTA open_session

IV. Related Vulnerabilities

Same product: optee_os
Same vendor: OP-TEE
Same weakness: CWE-787

V. Comments for CVE-2026-71969

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