Vulnerability 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.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Trustedfirmware | Op-Tee | >= 3.0.0, <= 4.10.0 |
Related Weaknesses (CWE)
References
- https://github.com/OP-TEE/optee_os/security/advisories/GHSA-fcm8-vjhf-6vqhVendor AdvisoryPatch
FAQ
What is CVE-2026-53763?
CVE-2026-53763 is a vulnerability with a CVSS score of 3.8 (LOW). 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...
How severe is CVE-2026-53763?
CVE-2026-53763 has been rated LOW with a CVSS base score of 3.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-53763?
Check the references section above for vendor advisories and patch information. Affected products include: Trustedfirmware Op-Tee.