CVE-2026-40257

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-40257", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-10T17:31:45.787Z", "datePublished": "2026-07-06T16:26:20.379Z", "dateUpdated": "2026-07-06T18:57:42.472Z"}, "containers": {"cna": {"title": "OP-TEE has SHA-3 accelerated finalize heap overflow", "problemTypes": [{"descriptions": [{"cweId": "CWE-787", "lang": "en", "description": "CWE-787: Out-of-bounds Write", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/OP-TEE/optee_os/security/advisories/GHSA-75x4-j8p9-55qv", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/OP-TEE/optee_os/security/advisories/GHSA-75x4-j8p9-55qv"}], "affected": [{"vendor": "OP-TEE", "product": "optee_os", "versions": [{"version": ">= 3.21.0, < 4.11.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-06T16:26:20.379Z"}, "descriptions": [{"lang": "en", "value": "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`."}], "source": {"advisory": "GHSA-75x4-j8p9-55qv", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-06T18:57:28.891502Z", "id": "CVE-2026-40257", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-06T18:57:42.472Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-40257", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-06T18:57:28.891502Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-06T18:57:35.991Z"}}], "cna": {"title": "OP-TEE has SHA-3 accelerated finalize heap overflow", "source": {"advisory": "GHSA-75x4-j8p9-55qv", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "OP-TEE", "product": "optee_os", "versions": [{"status": "affected", "version": ">= 3.21.0, < 4.11.0"}]}], "references": [{"url": "https://github.com/OP-TEE/optee_os/security/advisories/GHSA-75x4-j8p9-55qv", "name": "https://github.com/OP-TEE/optee_os/security/advisories/GHSA-75x4-j8p9-55qv", "tags": ["x_refsource_CONFIRM"]}], "descriptions": [{"lang": "en", "value": "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`."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-787", "description": "CWE-787: Out-of-bounds Write"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-06T16:26:20.379Z"}}}, "cveMetadata": {"cveId": "CVE-2026-40257", "state": "PUBLISHED", "dateUpdated": "2026-07-06T18:57:42.472Z", "dateReserved": "2026-04-10T17:31:45.787Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-07-06T16:26:20.379Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "optee_os", "vendor": "OP-TEE", "versions": [{"status": "affected", "version": ">= 3.21.0, < 4.11.0"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:trustedfirmware:op-tee:*:*:*:*:*:*:*:*", "matchCriteriaId": "C9D819B8-1780-4240-BF51-0FC2FF483CCD", "versionEndIncluding": "4.10.0", "versionStartIncluding": "3.21.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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`."}, {"lang": "es", "value": "OP-TEE es un Entorno de Ejecuci\u00f3n Confiable (TEE) dise\u00f1ado como compa\u00f1ero de un kernel de Linux no seguro ejecut\u00e1ndose en Arm; n\u00facleos Cortex-A usando la tecnolog\u00eda TrustZone. A partir de la versi\u00f3n 3.21.0 y antes de la versi\u00f3n 4.11.0, la implementaci\u00f3n SHA-3 acelerada por las Extensiones Criptogr\u00e1ficas de ARM tiene un error de \u2019off-by-one\u2019 que puede causar un desbordamiento de mont\u00edculo masivo que corrompe toda la memoria del kernel del TEE despu\u00e9s del estado del hash. Esto afecta a todas las plataformas construidas con \u2019CFG_CRYPTO_WITH_CE82=y\u2019 (ARMv8.2+ con Extensiones Criptogr\u00e1ficas SHA3). La versi\u00f3n 4.11.0 contiene un parche. Como soluci\u00f3n alternativa, deshabilite las Extensiones Criptogr\u00e1ficas SHA3 con \u2019CFG_CRYPTO_WITH_CE82=n\u2019."}], "id": "CVE-2026-40257", "lastModified": "2026-10-25T20:10:00.147", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-40257", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-06T18:57:28.891502Z", "version": "2.0.3"}}]}, "published": "2026-07-06T17:16:31.253", "references": [{"source": "security-advisories@github.com", "tags": ["Mitigation", "Patch", "Vendor Advisory"], "url": "https://github.com/OP-TEE/optee_os/security/advisories/GHSA-75x4-j8p9-55qv"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.21.0,4.11.0)"}}], "enrichment": {"confidence": 97.0, "confidence_source": "matching", "scores": [{"score": 97.0, "source": "matching"}]}, "original": {"product": "optee_os", "source": "cna", "vendor": "OP-TEE"}, "product": "op-tee_os", "vendor": "op-tee"}], "created": "2026-07-06T22:15:15.523184+00:00", "updated": "2026-08-01T18:30:05.022562+00:00", "vendors": ["op-tee", "op-tee$PRODUCT$op-tee_os"]}