CVE-2026-53763
OP-TEE has AES-GCM 32-bit integer overflow in length counters that breaks authentication guarantee
CVSS Score
3.8
EPSS Score
0.1%
EPSS Percentile
5th
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.
| CWE | CWE-190 |
| Vendor | op-tee |
| Product | optee_os |
| Published | Jul 6, 2026 |
| Last Updated | Jul 7, 2026 |
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CVSS v3 Breakdown
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N Affected Versions
OP-TEE / optee_os
>= 3.0.0, < 4.11.0