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CVE-2026-53763

OP-TEE has AES-GCM 32-bit integer overflow in length counters that breaks authentication guarantee

Published: Jul 6, 2026Updated: Jul 7, 2026 Sources: CVE List NVDCWE-190
3.8LOW
NVD MITRE
EPSS Score
0.1%
Top 95.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:CC:NI:LA:N
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-190

Affected Products

trustedfirmware
commercialaka mbed tls, op-tee, trusted firmware-a
op-teeOn-prem
Security Products / pki-crypto
OP-TEE
oss-projectaka op-tee os, optee
optee_osEmbedded
Operating Systems / rtos-embedded-os

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://github.com/OP-TEE/optee_os/security/advisories/GHSA-fcm8-vjhf-6vqh
github.com

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