CVE-2026-71969— OP-TEE OS 4.10.0 Buffer Underwrite via RSA NOPAD Encrypt/Decrypt Operations
Possible ATT&CK Techniques 1AI
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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
Affected Products
II. Public POCs for CVE-2026-71969
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Patches & Fixes for CVE-2026-71969 (3)
Vendor Advisories 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
- CVE-2026-71968
OP-TEE OS 4.10.0 Use-After-Free via Trusted Application Load - CVE-2026-71967
OP-TEE OS 4.10.0 NULL Pointer Dereference DoS via Widevine P - CVE-2026-53763
OP-TEE has AES-GCM 32-bit integer overflow in length counter - CVE-2026-44362
OP-TEE's subkey rollback protection can be bypassed with old - CVE-2026-42546
OP-TEE has missing OPTEE_MSG_ATTR_TYPE_MASK in cleanup_shm_r
Same vendor: OP-TEE
- CVE-2026-71968
OP-TEE OS 4.10.0 Use-After-Free via Trusted Application Load - CVE-2026-71967
OP-TEE OS 4.10.0 NULL Pointer Dereference DoS via Widevine P - CVE-2026-53763
OP-TEE has AES-GCM 32-bit integer overflow in length counter - CVE-2026-44362
OP-TEE's subkey rollback protection can be bypassed with old - CVE-2026-42546
OP-TEE has missing OPTEE_MSG_ATTR_TYPE_MASK in cleanup_shm_r
Same weakness: CWE-787
V. Comments for CVE-2026-71969
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