CVE catalog

CVE-2026-40257

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 3.21.0 and prior t

[CVE catalog]

Severity
High · CVSS 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Published
Source
[NVD] · [CVE record]
EPSS
0.15% · Oct 25, 2026

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 3.21.0 and prior to version 4.11.0, the ARM Crypto Extensions accelerated SHA-3 implementation has an off-by-one error that can cause a massive heap overflow that corrupts all TEE kernel memory following the hash state. This affects all platforms built with `CFG_CRYPTO_WITH_CE82=y` (ARMv8.2+ with SHA3 Crypto Extensions). Version 4.11.0 contains a patch. As a workaround, disable SHA3 Crypto Extensions with `CFG_CRYPTO_WITH_CE82=n`.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

DistributionPackageReleaseVersionStatus
Cpeop-teeNot reportedNot reportedunknown
Debianoptee-os134.10.0-1vulnerable
Debianoptee-os134.10.0-2vulnerable
Debianoptee-os134.5.0-2vulnerable
Debianoptee-os134.7.0-1vulnerable
Debianoptee-os134.8.0-1vulnerable
Debianoptee-os134.9.0-1vulnerable
Cpeop-teeNot reportedNot reportedunknown

Fixed-version evidence

OpenFactory catalog packages

[Debian 13 (Trixie)]

  • [optee-os]Affected
    Details (1)

    • 4.5.0-2 · arm64 · trixie

      Affected

      nvd · optee-os · debian · 13

  • [optee-os-dev]Affected

    Source package: [optee-os]

    Details (1)

    • 4.5.0-2 · arm64 · trixie

      Affected

      nvd · optee-os · debian · 13

Observed:

References

[FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]