FKIE_CVE-2021-46775

Vulnerability from fkie_nvd - Published: 2023-05-09 19:15 - Updated: 2026-06-17 04:15
Summary
Improper input validation in ABL may enable an attacker with physical access, to perform arbitrary memory overwrites, potentially leading to a loss of integrity and code execution.
Impacted products
Vendor Product Version
amd epyc_72f3_firmware milanpi_1.0.0.9
amd epyc_72f3 -
amd epyc_7313_firmware milanpi_1.0.0.9
amd epyc_7313 -
amd epyc_7313p_firmware milanpi_1.0.0.9
amd epyc_7313p -
amd epyc_7343_firmware milanpi_1.0.0.9
amd epyc_7343 -
amd epyc_7373x_firmware milanpi_1.0.0.9
amd epyc_7373x -
amd epyc_73f3_firmware milanpi_1.0.0.9
amd epyc_73f3 -
amd epyc_7413_firmware milanpi_1.0.0.9
amd epyc_7413 -
amd epyc_7443_firmware milanpi_1.0.0.9
amd epyc_7443 -
amd epyc_7443p_firmware milanpi_1.0.0.9
amd epyc_7443p -
amd epyc_7453_firmware milanpi_1.0.0.9
amd epyc_7453 -
amd epyc_7473x_firmware milanpi_1.0.0.9
amd epyc_7473x -
amd epyc_74f3_firmware milanpi_1.0.0.9
amd epyc_74f3 -
amd epyc_7513_firmware milanpi_1.0.0.9
amd epyc_7513 -
amd epyc_7543_firmware milanpi_1.0.0.9
amd epyc_7543 -
amd epyc_7543p_firmware milanpi_1.0.0.9
amd epyc_7543p -
amd epyc_7573x_firmware milanpi_1.0.0.9
amd epyc_7573x -
amd epyc_75f3_firmware milanpi_1.0.0.9
amd epyc_75f3 -
amd epyc_7643_firmware milanpi_1.0.0.9
amd epyc_7643 -
amd epyc_7663_firmware milanpi_1.0.0.9
amd epyc_7663 -
amd epyc_7713_firmware milanpi_1.0.0.9
amd epyc_7713 -
amd epyc_7713p_firmware milanpi_1.0.0.9
amd epyc_7713p -
amd epyc_7763_firmware milanpi_1.0.0.9
amd epyc_7763 -
amd epyc_7773x_firmware milanpi_1.0.0.9
amd epyc_7773x -
amd epyc_7232p_firmware romepi_1.0.0.e
amd epyc_7232p -
amd epyc_7252_firmware romepi_1.0.0.e
amd epyc_7252 -
amd epyc_7262_firmware romepi_1.0.0.e
amd epyc_7262 -
amd epyc_7272_firmware romepi_1.0.0.e
amd epyc_7272 -
amd epyc_7282_firmware romepi_1.0.0.e
amd epyc_7282 -
amd epyc_7302_firmware romepi_1.0.0.e
amd epyc_7302 -
amd epyc_7302p_firmware romepi_1.0.0.e
amd epyc_7302p -
amd epyc_7352_firmware romepi_1.0.0.e
amd epyc_7352 -
amd epyc_7402_firmware romepi_1.0.0.e
amd epyc_7402 -
amd epyc_7402p_firmware romepi_1.0.0.e
amd epyc_7402p -
amd epyc_7452_firmware romepi_1.0.0.e
amd epyc_7452 -
amd epyc_7502_firmware romepi_1.0.0.e
amd epyc_7502 -
amd epyc_7502p_firmware romepi_1.0.0.e
amd epyc_7502p -
amd epyc_7532_firmware romepi_1.0.0.e
amd epyc_7532 -
amd epyc_7542_firmware romepi_1.0.0.e
amd epyc_7542 -
amd epyc_7552_firmware romepi_1.0.0.e
amd epyc_7552 -
amd epyc_7642_firmware romepi_1.0.0.e
amd epyc_7642 -
amd epyc_7662_firmware romepi_1.0.0.e
amd epyc_7662 -
amd epyc_7702_firmware romepi_1.0.0.e
amd epyc_7702 -
amd epyc_7702p_firmware romepi_1.0.0.e
amd epyc_7702p -
amd epyc_7742_firmware romepi_1.0.0.e
amd epyc_7742 -
amd epyc_7f32_firmware romepi_1.0.0.e
amd epyc_7f32 -
amd epyc_7f52_firmware romepi_1.0.0.e
amd epyc_7f52 -
amd epyc_7f72_firmware romepi_1.0.0.e
amd epyc_7f72 -
amd epyc_7h12_firmware romepi_1.0.0.e
amd epyc_7h12 -

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          "product": "2nd Gen AMD EPYC\u2122 ",
          "vendor": "AMD",
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              "version": "various "
            }
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        },
        {
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          ],
          "product": "3rd Gen AMD EPYC\u2122 ",
          "vendor": "AMD",
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            }
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          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 0.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "PHYSICAL",
          "availabilityImpact": "HIGH",
          "baseScore": 6.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 0.9,
        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-46775",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-01-28T15:56:46.211758Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2023-05-09T19:15:11.240",
  "references": [
    {
      "source": "psirt@amd.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001"
    }
  ],
  "sourceIdentifier": "psirt@amd.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Events included in the timeline

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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.