{"id":59328,"date":"2025-07-12T12:45:52","date_gmt":"2025-07-12T12:45:52","guid":{"rendered":""},"modified":"2025-10-04T00:13:53","modified_gmt":"2025-10-04T06:13:53","slug":"cve-2025-46733-critical-vulnerability-in-op-tee-resulting-in-potential-system-compromise-and-data-leakage","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-46733-critical-vulnerability-in-op-tee-resulting-in-potential-system-compromise-and-data-leakage\/","title":{"rendered":"CVE-2025-46733: Critical Vulnerability in OP-TEE Resulting in Potential System Compromise and Data Leakage<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

CVE-2025-46733 is a critical cybersecurity vulnerability that affects the OP-TEE Trusted Execution Environment (TEE), a companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. This vulnerability is particularly impactful as it could lead to system compromise or data leakage. It is crucial for organizations, cybersecurity professionals, and individuals utilizing this technology to understand the nature of this vulnerability<\/a>, its potential impact, and the necessary steps for mitigation.
\nThis vulnerability can be exploited by an attacker with access<\/a> to the REE userspace, enabling them to trigger a panic in a TA, potentially leading to the disruption of system operations or the unauthorized access to sensitive data. Given the widespread use of OP-TEE, this vulnerability could potentially affect a broad range of systems<\/a> and devices, emphasizing the need for immediate action to mitigate the threat.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-46733
\nSeverity: Critical – CVSS score 7.9
\nAttack Vector: Local
\nPrivileges Required: High
\nUser Interaction: None
\nImpact: System compromise<\/a>, potential data leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

OP-TEE | Version 4.5.0<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The vulnerability arises from the handling of return codes<\/a> in the OP-TEE’s libutee Secure Storage API. Specifically, the return codes of secure storage operations<\/a> are passed unsanitized from the REE tee-supplicant, through the Linux kernel tee-driver, through the OP-TEE kernel, back to libutee. An attacker with access to REE userspace and the ability to replace the tee-supplicant with their own process can exploit this vulnerability<\/a>, responding to storage requests with unexpected response codes, which in turn trigger a panic in the requesting TA.
\nThis vulnerability is particularly potent for TAs built with `TA_FLAG_SINGLE_INSTANCE` and `TA_FLAG_INSTANCE_KEEP_ALIVE`. An attacker who can trigger a panic in the TA and reload it with a clean memory space can manipulate the behavior of these TAs. A prime example is the optee_ftpm TA, where the attacker could reset the PCR values and extend them with their chosen values, potentially leading to falsified boot measurements and unauthorized access to sealed data<\/a>.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

While there is no specific example code for this exploit, the concept involves replacing the tee-supplicant binary with a malicious one, capable of responding to storage requests with unexpected response codes<\/a>. This could be conceptually represented as:<\/p>\n

# Stop the tee-supplicant\nkillall tee-supplicant\n# Execute malicious tee-supplicant\n.\/malicious_tee-supplicant<\/code><\/pre>\n
In the above pseudo-code, `malicious_tee-supplicant` would be a specially crafted binary that responds to storage requests with unexpected response codes, triggering a panic in the requesting TA.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview CVE-2025-46733 is a critical cybersecurity vulnerability that affects the OP-TEE Trusted Execution Environment (TEE), a companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. This vulnerability is particularly impactful as it could lead to system compromise or data leakage. It is crucial for organizations, cybersecurity professionals, and individuals […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[88],"product":[95],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-59328","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-linux","product-linux-kernel"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t