CVE-2026-20446

In sec boot, there is a possible out of bounds write due to an integer overflow. This could lead to local denial of service, if an attacker has physical access to the device, with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS09963054; Issue ID: MSV-3899.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.7 / Impact : 3.6

Attack Vector PHYSICAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://corp.mediatek.com/product-security-bulletin/April-2026	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:mediatek:mt6813_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6813:-:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-04-07 04:17

Updated : 2026-06-17 10:17

NVD link : CVE-2026-20446

Mitre link : CVE-2026-20446

CVE.ORG link : CVE-2026-20446

JSON object : View

Products Affected

mediatek

mt6813
mt6813_firmware

CWE

CWE-787

Out-of-bounds Write

CWE-190

Integer Overflow or Wraparound

{"id": "CVE-2026-20446", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-20446", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-07T13:02:11.913705Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "PHYSICAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:P/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"}, "impactScore": 3.6, "exploitabilityScore": 0.7}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "PHYSICAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:P/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"}, "impactScore": 3.6, "exploitabilityScore": 0.7}]}, "affected": [{"source": "security@mediatek.com", "affectedData": [{"vendor": "MediaTek, Inc.", "product": "MediaTek chipset", "versions": [{"status": "affected", "version": "MT6813"}], "defaultStatus": "unaffected"}]}], "published": "2026-04-07T04:17:13.797", "references": [{"url": "https://corp.mediatek.com/product-security-bulletin/April-2026", "tags": ["Vendor Advisory"], "source": "security@mediatek.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@mediatek.com", "description": [{"lang": "en", "value": "CWE-787"}]}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-190"}]}], "descriptions": [{"lang": "en", "value": "In sec boot, there is a possible out of bounds write due to an integer overflow. This could lead to local denial of service, if an attacker has physical access to the device, with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS09963054; Issue ID: MSV-3899."}, {"lang": "es", "value": "En el arranque seguro, existe una posible escritura fuera de l\u00edmites debido a un desbordamiento de entero. Esto podr\u00eda llevar a una denegaci\u00f3n de servicio local, si un atacante tiene acceso f\u00edsico al dispositivo, con los privilegios de ejecuci\u00f3n de usuario necesarios. No se necesita interacci\u00f3n del usuario para la explotaci\u00f3n. ID del parche: ALPS09963054; ID del problema: MSV-3899."}], "lastModified": "2026-06-17T10:17:28.197", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt6813_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0E1CB25C-4643-4239-AE47-B5AE876416ED"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt6813:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "66F9EAE4-F1D7-46DB-AA2A-0290F6EF0501"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "security@mediatek.com"}