CVE-2026-40257

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Source

https://cve.org/CVERecord?id=CVE-2026-40257

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40257.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-40257

Aliases

GHSA-75x4-j8p9-55qv

Downstream

Published

2026-07-06T16:26:20Z

Modified

2026-10-21T02:57:05Z

Severity

5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator

Summary

OP-TEE has SHA-3 accelerated finalize heap overflow

Details

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.

Database specific

{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-787"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40257.json"
}

References

Affected packages

Git / github.com/op-tee/optee_os

Affected ranges

Type

GIT

Repo

https://github.com/op-tee/optee_os

Events

Introduced

e8abbcfbdf63437a640d5fd87b7e191caab6445e

Fixed

f54190f22611dd5ad5d22546fd4209aa100f56bd

Database specific

Show details

{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "3.21.0"
                },
                {
                    "fixed":  "4.11.0"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        }
    ]
}

Affected versions

3.*

3.21.0

3.22.0

3.22.0-rc1

4.*

4.0.0

4.0.0-rc1

4.1.0

4.1.0-rc1

4.10.0

4.10.0-rc1

4.11.0-rc1

4.2.0

4.2.0-rc1

4.3.0

4.3.0-rc1

4.4.0

4.4.0-rc1

4.5.0

4.5.0-rc1

4.6.0

4.6.0-rc1

4.7.0

4.7.0-rc1

4.8.0

4.8.0-rc1

4.9.0

4.9.0-rc1

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40257.json"