CVE-2026-53763
OP-TEE has AES-GCM 32-bit integer overflow in length counters that breaks authentication guarantee
Description
OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. Starting in version 3.0.0 and prior to version 4.11.0, 32-bit integer overflows in OP-TEE core's AES-GCM implementation cause the authentication tag to be computed with incorrect bit-length values after processing more than 512 megabytes of payload or Additional Authenticated Data (AAD). Version 4.11.0 contains a patch. No known workarounds are available.
INFO
Published Date :
July 6, 2026, 8:16 p.m.
Last Modified :
Oct. 25, 2026, 8:10 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.0 | LOW | [email protected] |
Solution
- Update OP-TEE to version 4.11.0 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-53763.
| URL | Resource |
|---|---|
| https://github.com/OP-TEE/optee_os/security/advisories/GHSA-fcm8-vjhf-6vqh | Vendor Advisory Patch |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-53763 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-53763
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-53763 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-53763 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Translated by [email protected]
Oct. 25, 2026
Action Type Old Value New Value Added Translation Title: optee_os de OP-TEE, Description: OP-TEE es un Entorno de Ejecución Confiable (TEE) diseñado como compañero de un kernel de Linux no seguro ejecutándose en núcleos Arm Cortex-A usando la tecnología TrustZone. A partir de la versión 3.0.0 y antes de la versión 4.11.0, los desbordamientos de enteros de 32 bits en la implementación AES-GCM del núcleo de OP-TEE causan que la etiqueta de autenticación sea calculada con valores de longitud de bits incorrectos después de procesar más de 512 megabytes de carga útil o Datos Autenticados Adicionales (AAD). La versión 4.11.0 contiene un parche. No hay soluciones alternativas conocidas disponibles. -
Initial Analysis by [email protected]
Jul. 07, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:o:trustedfirmware:op-tee:*:*:*:*:*:*:*:* versions from (including) 3.0.0 up to (including) 4.10.0 Added Reference Type GitHub, Inc.: https://github.com/OP-TEE/optee_os/security/advisories/GHSA-fcm8-vjhf-6vqh Types: Patch, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 07, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-53763', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-07T14:10:42.847861Z'} -
New CVE Received by [email protected]
Jul. 06, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'OP-TEE', 'product': 'optee_os', 'versions': [{'status': 'affected', 'version': '>= 3.0.0, < 4.11.0'}]}] Added Description OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. Starting in version 3.0.0 and prior to version 4.11.0, 32-bit integer overflows in OP-TEE core's AES-GCM implementation cause the authentication tag to be computed with incorrect bit-length values after processing more than 512 megabytes of payload or Additional Authenticated Data (AAD). Version 4.11.0 contains a patch. No known workarounds are available. Added CVSS V3 AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N Added CWE CWE-190 Added Reference https://github.com/OP-TEE/optee_os/security/advisories/GHSA-fcm8-vjhf-6vqh