Bug 2497457 (CVE-2026-53763)

Summary: CVE-2026-53763 OP-TEE: OP-TEE: Data integrity compromise due to integer overflow in AES-GCM
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in OP-TEE (Trusted Execution Environment). This vulnerability involves 32-bit integer overflows within the AES-GCM cryptographic implementation. When processing large amounts of data (over 512 megabytes), the system may incorrectly compute the authentication tag. This could allow a local attacker to bypass authentication, potentially leading to a compromise of data integrity.
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Bug Depends On: 2497690    
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Description OSIDB Bzimport 2026-07-06 20:02:16 UTC
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.