CVE-2026-53763

FAUCET Score

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.

First published: Jul 6, 2026Last modified: Jul 6, 2026

Impacted Technologies

Vendor	Product	Version(s)	CPE
		>= 3.0.0, <= 4.10.0CPE matchmatch criteria	cpe:2.3:o:trustedfirmware:op-tee::::::::

CVSS Data

CVSS version used by this source: 3.0

3.8LOW

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

Exploitability Score

2.0

Impact Score

1.4

CvssVersion

3.0

Exploit Intelligence

EPSS Score

0.15%

Probability of exploitation in next 30 days

EPSS Percentile

4.6%

Percentile rank of EPSS score among Peer Group

As of 2026-07-28

Model: v2026.06.15

This CVE's current EPSS score of 0.0015 is in the 32nd percentile among its peer group of 1,511 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference

View patch

References

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

Vendor AdvisoryPatch