Black & White Path

Aug 10, 2026 · Information Security

How Researchers Bypassed OP-TEE’s TrustZone: A Full Exploit Chain on Arm Devices

The article details three critical OP-TEE vulnerabilities—an RSA NOPAD underflow leading to a write‑what‑where primitive, a Widevine PTA null‑session bug, and a misuse of TA_FLAG_CONCURRENT—explaining the heap‑grooming steps, exploit flow, and the patches submitted upstream in 2026.