CVE-2021-35465
Estado: ModificadaBaja (3.4)—
Certain Arm products before 2021-08-23 do not properly consider the effect of exceptions on a VLLDM instruction. A Non-secure handler may have read or write access to part of a Secure context. This affects Arm Cortex-M33 r0p0 through r1p0, Arm Cortex-M35P r0, Arm Cortex-M55 r0p0 through r1p0, and Arm China STAR-MC1 (in the STAR SE configuration).
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
- Puntuación base: 3.4
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.30%
- Percentil entre todas las CVEs puntuadas: 21
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (4)
CWE
- NVD-CWE-Other
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2021-35465",
"cveTags": [],
"metrics": {
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 3.6,
"accessVector": "LOCAL",
"vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:N",
"authentication": "NONE",
"integrityImpact": "PARTIAL",
"accessComplexity": "LOW",
"availabilityImpact": "NONE",
"confidentialityImpact": "PARTIAL"
},
"acInsufInfo": false,
"impactScore": 4.9,
"baseSeverity": "LOW",
"obtainAllPrivilege": false,
"exploitabilityScore": 3.9,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 3.4,
"attackVector": "LOCAL",
"baseSeverity": "LOW",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N",
"integrityImpact": "LOW",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "HIGH",
"confidentialityImpact": "LOW"
},
"impactScore": 2.5,
"exploitabilityScore": 0.8
}
]
},
"affected": [
{
"source": "cve@mitre.org",
"affectedData": [
{
"vendor": "n/a",
"product": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
]
}
],
"published": "2021-08-23T13:15:07.667",
"references": [
{
"url": "https://developer.arm.com/support/arm-security-updates",
"tags": [
"Vendor Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://developer.arm.com/support/arm-security-updates/vlldm-instruction-security-vulnerability",
"tags": [
"Vendor Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://developer.arm.com/support/arm-security-updates",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://developer.arm.com/support/arm-security-updates/vlldm-instruction-security-vulnerability",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "NVD-CWE-Other"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Certain Arm products before 2021-08-23 do not properly consider the effect of exceptions on a VLLDM instruction. A Non-secure handler may have read or write access to part of a Secure context. This affects Arm Cortex-M33 r0p0 through r1p0, Arm Cortex-M35P r0, Arm Cortex-M55 r0p0 through r1p0, and Arm China STAR-MC1 (in the STAR SE configuration)."
},
{
"lang": "es",
"value": "Determinados productos de Arm antes del 23-08-2021 no consideran apropiadamente el efecto de las excepciones en una instrucción VLLDM. Un manejador no seguro puede tener acceso de lectura o escritura a parte de un contexto seguro. Esto afecta a Arm Cortex-M33 r0p0 versiones hasta r1p0, Arm Cortex-M35P r0, Arm Cortex-M55 r0p0 versiones hasta r1p0, y Arm China STAR-MC1 (en la configuración STAR SE)."
}
],
"lastModified": "2026-06-17T03:57:31.683",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:arm:cortex-m33_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8743FD78-DA56-4809-9BE7-2CD84F785598",
"versionEndIncluding": "r1p0",
"versionStartIncluding": "r0p0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:arm:cortex-m33:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "4595439A-ADC7-4C65-9DEB-6DEFE8F9A48F"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:arm:cortex-m35p_firmware:r0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F7CD4A53-9AFC-40CA-8BA3-611B2E27AC51"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:arm:cortex-m35p:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "420AB2CA-D4C8-46C8-9E0F-813ADBF5DCBC"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:arm:cortex-m55_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7D345484-BA9B-4F6C-9B54-6FEB6C8F0DC6",
"versionEndIncluding": "r1p0",
"versionStartIncluding": "r0p0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:arm:cortex-m55:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "79E2E419-58A9-4F2E-B7A7-C9CB177F6543"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:arm:china_star-mc1_firmware:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "325B4E68-0CEB-4D13-AF1E-118C4851A28C"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:arm:china_star-mc1:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "8DC6F685-2230-4560-BFEA-A2231C0A6C1A"
}
],
"operator": "OR"
}
],
"operator": "AND"
}
],
"sourceIdentifier": "cve@mitre.org"
}