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 AES-GCM implementation of the OP-TEE optee_os core. Specifically, 32-bit integer overflows occur when processing payloads or AAD larger than 512 MB, leading to incorrect computation of the authentication tag bit-length. This affects OP-TEE versions starting at 3.0.0 and prior to 4.11.0. The vulnerability could impact the integrity of authenticated encryption operations. Version 4.11.0 contains a patch addressing this issue. No workarounds have been identified.
Potential Impact
The vulnerability causes the AES-GCM authentication tag to be computed incorrectly after processing large amounts of data, potentially undermining the integrity guarantees of the cryptographic operation. There is no impact on confidentiality or availability reported. The CVSS score is 3.8 (low severity), reflecting limited impact and the requirement for local privileges with low complexity to exploit.
Mitigation Recommendations
Upgrade OP-TEE optee_os to version 4.11.0 or later, which contains a patch for this integer overflow vulnerability. No known workarounds exist. Users should apply this official fix to ensure correct AES-GCM authentication tag computation.
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 AES-GCM implementation of the OP-TEE optee_os core. Specifically, 32-bit integer overflows occur when processing payloads or AAD larger than 512 MB, leading to incorrect computation of the authentication tag bit-length. This affects OP-TEE versions starting at 3.0.0 and prior to 4.11.0. The vulnerability could impact the integrity of authenticated encryption operations. Version 4.11.0 contains a patch addressing this issue. No workarounds have been identified.
Potential Impact
The vulnerability causes the AES-GCM authentication tag to be computed incorrectly after processing large amounts of data, potentially undermining the integrity guarantees of the cryptographic operation. There is no impact on confidentiality or availability reported. The CVSS score is 3.8 (low severity), reflecting limited impact and the requirement for local privileges with low complexity to exploit.
Mitigation Recommendations
Upgrade OP-TEE optee_os to version 4.11.0 or later, which contains a patch for this integer overflow vulnerability. No known workarounds exist. Users should apply this official fix to ensure correct AES-GCM authentication tag computation.
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: 07/14/2026, 09:00:20 UTC
Last updated: 08/21/2026, 10:52:11 UTC
Views: 69
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