FKIE_CVE-2021-26383
Vulnerability from fkie_nvd - Published: 2025-09-06 00:15 - Updated: 2026-06-17 03:43
Severity
Summary
Insufficient bounds checking in AMD TEE (Trusted Execution Environment) could allow an attacker with a compromised userspace to invoke a command with malformed arguments leading to out of bounds memory access, potentially resulting in loss of integrity or availability.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "affected",
"product": "AMD Ryzen\u2122 5000 Series Mobile Processors with Radeon\u2122 Graphics",
"vendor": "AMD",
"versions": [
{
"status": "unaffected",
"version": "CezannePI-FP6 1.0.0.6"
}
]
},
{
"defaultStatus": "affected",
"product": "AMD Ryzen\u2122 4000 Series Desktop Processors",
"vendor": "AMD",
"versions": [
{
"status": "unaffected",
"version": "ComboAM4v2 PI 1.2.0.5"
}
]
},
{
"defaultStatus": "affected",
"product": "AMD Ryzen\u2122 7030 Series Mobile Processors with Radeon\u2122 Graphics",
"vendor": "AMD",
"versions": [
{
"status": "unaffected",
"version": "CezannePI-FP6 1.0.0.6"
}
]
},
{
"defaultStatus": "affected",
"product": "AMD Ryzen\u2122 5000 Series Desktop Processors with Radeon\u2122 Graphics",
"vendor": "AMD",
"versions": [
{
"status": "unaffected",
"version": "ComboAM4v2 PI 1.2.0.5"
}
]
},
{
"defaultStatus": "affected",
"product": "AMD Ryzen\u2122 4000 Series Mobile Processors with Radeon\u2122 Graphics",
"vendor": "AMD",
"versions": [
{
"status": "unaffected",
"version": "RenoirPI-FP6 1.0.0.7"
}
]
},
{
"defaultStatus": "affected",
"product": "AMD Ryzen\u2122 Embedded V2000 Series Processors",
"vendor": "AMD",
"versions": [
{
"status": "unaffected",
"version": "EmbeddedPI-FP6_1.0.0.6"
}
]
},
{
"defaultStatus": "affected",
"product": "AMD Radeon\u2122 RX 5000 Series Graphics Products",
"vendor": "AMD",
"versions": [
{
"status": "unaffected",
"version": "AMD Software: Adrenalin Edition 23.2.1 (22.40.01.45)"
}
]
},
{
"defaultStatus": "affected",
"product": "AMD Radeon\u2122 RX 6000 Series Graphics Products",
"vendor": "AMD",
"versions": [
{
"status": "unaffected",
"version": "AMD Software: Adrenalin Edition 23.2.1 (22.40.01.45)"
}
]
},
{
"defaultStatus": "affected",
"product": "AMD Radeon\u2122 PRO W5000 Series Graphics Products",
"vendor": "AMD",
"versions": [
{
"status": "unaffected",
"version": "AMD Software: PRO Edition 23.Q1 (22.40.37.05)"
}
]
},
{
"defaultStatus": "affected",
"product": "AMD Radeon\u2122 PRO W6000 Series Graphics Products",
"vendor": "AMD",
"versions": [
{
"status": "unaffected",
"version": "AMD Software: PRO Edition 23.Q1 (22.40.37.05)"
}
]
},
{
"defaultStatus": "affected",
"product": "AMD Instinct\u2122 MI210",
"vendor": "AMD",
"versions": [
{
"status": "unaffected",
"version": "ROCm 6.4"
}
]
},
{
"defaultStatus": "affected",
"product": "AMD Instinct\u2122 MI250",
"vendor": "AMD",
"versions": [
{
"status": "unaffected",
"version": "ROCm 6.4"
}
]
},
{
"defaultStatus": "affected",
"product": "AMD Radeon\u2122 PRO V520 Graphics Products",
"vendor": "AMD",
"versions": [
{
"status": "unaffected",
"version": "Contact your AMD Customer Engineering representative"
}
]
},
{
"defaultStatus": "affected",
"product": "AMD Radeon\u2122 PRO V620 Graphics Products",
"vendor": "AMD",
"versions": [
{
"status": "unaffected",
"version": "Contact your AMD Customer Engineering representative"
}
]
}
],
"source": "psirt@amd.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Insufficient bounds checking in AMD TEE (Trusted Execution Environment) could allow an attacker with a compromised userspace to invoke a command with malformed arguments leading to out of bounds memory access, potentially resulting in loss of integrity or availability."
}
],
"id": "CVE-2021-26383",
"lastModified": "2026-06-17T03:43:17.503",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.9,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.5,
"impactScore": 5.8,
"source": "psirt@amd.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2021-26383",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-09-08T13:49:47.320770Z",
"version": "2.0.3"
}
}
]
},
"published": "2025-09-06T00:15:33.930",
"references": [
{
"source": "psirt@amd.com",
"url": "https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-4012.html"
},
{
"source": "psirt@amd.com",
"url": "https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-5007.html"
},
{
"source": "psirt@amd.com",
"url": "https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-6018.html"
}
],
"sourceIdentifier": "psirt@amd.com",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-787"
}
],
"source": "psirt@amd.com",
"type": "Secondary"
}
]
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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