GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration
usn-7561-1
Vulnerability from osv_ubuntu
Published
2025-06-09 13:38
Modified
2026-02-10 04:48
Summary
amd64-microcode vulnerabilities
Details

It was discovered that AMD Microcode incorrectly handled memory addresses. An attacker with local administrator privilege could possibly use this issue to cause loss of integrity of a confidential guest running under AMD SEV-SNP. (CVE-2023-20584, CVE-2023-31356)

Josh Eads, Kristoffer Janke, Eduardo Nava, Tavis Ormandy and Matteo Rizzo discovered that AMD Microcode incorrectly verified signatures. An attacker with local administrator privilege could possibly use this issue to cause loss of confidentiality and integrity of a confidential guest running under AMD SEV-SNP. (CVE-2024-56161)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2023-20584",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2023-31356",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2024-56161",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "amd64-microcode",
            "binary_version": "3.20250311.1ubuntu0.24.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "amd64-microcode",
        "purl": "pkg:deb/ubuntu/amd64-microcode@3.20250311.1ubuntu0.24.04.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.20250311.1ubuntu0.24.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.20230808.1.1ubuntu1",
        "3.20231019.1ubuntu1",
        "3.20231019.1ubuntu2",
        "3.20231019.1ubuntu2.1"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that AMD Microcode incorrectly handled memory addresses.\nAn attacker with local administrator privilege could possibly use this\nissue to cause loss of integrity of a confidential guest running under AMD\nSEV-SNP. (CVE-2023-20584, CVE-2023-31356)\n\nJosh Eads, Kristoffer Janke, Eduardo Nava, Tavis Ormandy and Matteo Rizzo\ndiscovered that AMD Microcode incorrectly verified signatures. An attacker\nwith local administrator privilege could possibly use this issue to cause\nloss of confidentiality and integrity of a confidential guest running under\nAMD SEV-SNP. (CVE-2024-56161)",
  "id": "USN-7561-1",
  "modified": "2026-02-10T04:48:59Z",
  "published": "2025-06-09T13:38:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7561-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-20584"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-31356"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-56161"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "amd64-microcode vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2023-20584",
    "UBUNTU-CVE-2023-31356",
    "UBUNTU-CVE-2024-56161"
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.


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.