CVE-2026-53763: CWE-190: Integer Overflow or Wraparound in OP-TEE optee_os
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.
AI Analysis
Technical Summary
CVE-2026-53763 is an integer overflow (CWE-190) vulnerability in the OP-TEE optee_os core's AES-GCM cryptographic implementation. Specifically, 32-bit integer overflows occur when processing large amounts of data (over 512 MB) or AAD, leading to incorrect computation of the authentication tag. This affects OP-TEE versions from 3.0.0 up to but excluding 4.11.0. The vulnerability has a CVSS 3.0 base score of 3.8 (low severity) with local attack vector, low complexity, requiring low privileges and no user interaction, causing integrity loss but no confidentiality or availability impact. The issue is patched in version 4.11.0. No known exploits or workarounds exist.
Potential Impact
The vulnerability causes the AES-GCM authentication tag to be computed incorrectly due to integer overflow, potentially allowing an attacker with local access and low privileges to cause integrity loss in cryptographic operations. There is no impact on confidentiality or availability. Exploitation requires processing large data volumes and local access.
Mitigation Recommendations
Upgrade OP-TEE optee_os to version 4.11.0 or later, which contains the official patch for this vulnerability. No workarounds are currently known. Since this is not a cloud service, remediation depends on applying the updated software version.
CVE-2026-53763: CWE-190: Integer Overflow or Wraparound in OP-TEE optee_os
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 v3.0
Score 3.8low
Affected software
pkg:github/op-tee/optee_osRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-53763 is an integer overflow (CWE-190) vulnerability in the OP-TEE optee_os core's AES-GCM cryptographic implementation. Specifically, 32-bit integer overflows occur when processing large amounts of data (over 512 MB) or AAD, leading to incorrect computation of the authentication tag. This affects OP-TEE versions from 3.0.0 up to but excluding 4.11.0. The vulnerability has a CVSS 3.0 base score of 3.8 (low severity) with local attack vector, low complexity, requiring low privileges and no user interaction, causing integrity loss but no confidentiality or availability impact. The issue is patched in version 4.11.0. No known exploits or workarounds exist.
Potential Impact
The vulnerability causes the AES-GCM authentication tag to be computed incorrectly due to integer overflow, potentially allowing an attacker with local access and low privileges to cause integrity loss in cryptographic operations. There is no impact on confidentiality or availability. Exploitation requires processing large data volumes and local access.
Mitigation Recommendations
Upgrade OP-TEE optee_os to version 4.11.0 or later, which contains the official patch for this vulnerability. No workarounds are currently known. Since this is not a cloud service, remediation depends on applying the updated software version.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-10T17:48:40.547Z
- Cvss Version
- 3.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a4c076a27e9c7971920cc15
Added to database: 07/06/2026, 19:52:10 UTC
Last enriched: 07/06/2026, 20:07:00 UTC
Last updated: 07/06/2026, 23:25:28 UTC
Views: 7
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.