Preface: The iframe (Inline Frame) is an HTML element used to embed another document or website within the current web page (e.g., embedding a YouTube video or a Google Map).

Background: High-bandwidth Digital Content Protection (HDCP) in a Trusted Execution Environment (TEE) refers to securing the handshake, authentication, and encryption keys of audio/video content within a secure, isolated area of a device’s processor.

• When a HDCP session is deinitialized, the non-secure buffer allocated for communication with the TEE is freed.
• However, if the cleanup sequence does not enforce strict ordering, “lingering references” (such as asynchronous callbacks or TEE drivers) might still attempt to access that memory.
• This results in a memory corruption (Use-After-Free), allowing a local attacker with low privileges to potentially escalate their rights or cause a system crash. 

This is a memory integrity issue, not a cryptographic one.  Memory corruption during deinitialization. The vulnerability resides in the way the HLOS (Android kernel/drivers) and TrustZone interact, the fix must be applied at the Firmware/Kernel level via a system update from the manufacturer (OEM). 

Vulnerability details:

Title: Exposed Dangerous Method or Function in HLOS

Description: Cryptographic issue when a Trusted Zone with outdated code is triggered by a HLOS providing incorrect input.

Technology Area: HLOS

Vulnerability Type: CWE-749 Exposed Dangerous Method or Function.

Risk Level High (CVSS Score: 7.8)

Affected Platforms: Multiple Qualcomm Chipsets (including Snapdragon series)

Official announcement: Please refer to the link for more details –

https://docs.qualcomm.com/securitybulletin/february-2026-bulletin.html