{
  "document": {
    "aggregate_severity": {
      "text": "Medium"
    },
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
      "namespace": "https://tuxcare.com/"
    },
    "references": [
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.tuxcare.com/csaf/v2/els_os/rhel7els/vex/2021/cve-2021-0127-els_os-rhel7els.json"
      }
    ],
    "tracking": {
      "current_release_date": "2026-07-28T15:54:06Z",
      "generator": {
        "date": "2026-07-28T15:54:06Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CVE-2021-0127-ELS_OS-RHEL7ELS",
      "initial_release_date": "2021-01-01T00:00:00Z",
      "revision_history": [
        {
          "date": "2021-01-01T00:00:00Z",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-07-28T15:54:06Z",
          "number": "2",
          "summary": "Official Publication"
        }
      ],
      "status": "final",
      "version": "2"
    },
    "title": "Security update on CVE-2021-0127"
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat Enterprise Linux 7",
                "product": {
                  "name": "Red Hat Enterprise Linux 7",
                  "product_id": "Red-Hat-7",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:o:redhat:enterprise_linux:7:*:*:*:*:*:*:*"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat Enterprise Linux"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "microcode_ctl-2:2.1-73.25.el7_9.x86_64",
                "product": {
                  "name": "microcode_ctl-2:2.1-73.25.el7_9.x86_64",
                  "product_id": "microcode_ctl-2:2.1-73.25.el7_9.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/microcode_ctl@2.1-73.25.el7_9?arch=x86_64&epoch=2"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "microcode_ctl-2:2.1-73.26.el7_9.x86_64",
                "product": {
                  "name": "microcode_ctl-2:2.1-73.26.el7_9.x86_64",
                  "product_id": "microcode_ctl-2:2.1-73.26.el7_9.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/microcode_ctl@2.1-73.26.el7_9?arch=x86_64&epoch=2"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "x86_64"
          }
        ],
        "category": "vendor",
        "name": "Red Hat, Inc."
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "microcode_ctl-2:2.1-73.25.el7_9.tuxcare.els1.x86_64",
                "product": {
                  "name": "microcode_ctl-2:2.1-73.25.el7_9.tuxcare.els1.x86_64",
                  "product_id": "microcode_ctl-2:2.1-73.25.el7_9.tuxcare.els1.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/tuxcare/microcode_ctl@2.1-73.25.el7_9.tuxcare.els1?arch=x86_64&epoch=2"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "microcode_ctl-2:2.1-73.26.el7_9.tuxcare.els1.x86_64",
                "product": {
                  "name": "microcode_ctl-2:2.1-73.26.el7_9.tuxcare.els1.x86_64",
                  "product_id": "microcode_ctl-2:2.1-73.26.el7_9.tuxcare.els1.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/tuxcare/microcode_ctl@2.1-73.26.el7_9.tuxcare.els1?arch=x86_64&epoch=2"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "x86_64"
          }
        ],
        "category": "vendor",
        "name": "TuxCare"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "microcode_ctl-2:2.1-73.25.el7_9.tuxcare.els1.x86_64 as a component of Red Hat Enterprise Linux 7",
          "product_id": "Red-Hat-7:microcode_ctl-2:2.1-73.25.el7_9.tuxcare.els1.x86_64"
        },
        "product_reference": "microcode_ctl-2:2.1-73.25.el7_9.tuxcare.els1.x86_64",
        "relates_to_product_reference": "Red-Hat-7"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "microcode_ctl-2:2.1-73.25.el7_9.x86_64 as a component of Red Hat Enterprise Linux 7",
          "product_id": "Red-Hat-7:microcode_ctl-2:2.1-73.25.el7_9.x86_64"
        },
        "product_reference": "microcode_ctl-2:2.1-73.25.el7_9.x86_64",
        "relates_to_product_reference": "Red-Hat-7"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "microcode_ctl-2:2.1-73.26.el7_9.tuxcare.els1.x86_64 as a component of Red Hat Enterprise Linux 7",
          "product_id": "Red-Hat-7:microcode_ctl-2:2.1-73.26.el7_9.tuxcare.els1.x86_64"
        },
        "product_reference": "microcode_ctl-2:2.1-73.26.el7_9.tuxcare.els1.x86_64",
        "relates_to_product_reference": "Red-Hat-7"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "microcode_ctl-2:2.1-73.26.el7_9.x86_64 as a component of Red Hat Enterprise Linux 7",
          "product_id": "Red-Hat-7:microcode_ctl-2:2.1-73.26.el7_9.x86_64"
        },
        "product_reference": "microcode_ctl-2:2.1-73.26.el7_9.x86_64",
        "relates_to_product_reference": "Red-Hat-7"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-0127",
      "notes": [
        {
          "category": "description",
          "text": "Insufficient control flow management in some Intel(R) Processors may allow an authenticated user to potentially enable a denial of service via local access.",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "known_affected": [
          "Red-Hat-7:microcode_ctl-2:2.1-73.25.el7_9.tuxcare.els1.x86_64",
          "Red-Hat-7:microcode_ctl-2:2.1-73.25.el7_9.x86_64",
          "Red-Hat-7:microcode_ctl-2:2.1-73.26.el7_9.tuxcare.els1.x86_64",
          "Red-Hat-7:microcode_ctl-2:2.1-73.26.el7_9.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2021-0127"
        },
        {
          "category": "external",
          "summary": "https://security.netapp.com/advisory/ntap-20220210-0008/",
          "url": "https://security.netapp.com/advisory/ntap-20220210-0008/"
        },
        {
          "category": "external",
          "summary": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00532.html",
          "url": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00532.html"
        }
      ],
      "release_date": "2022-02-09T23:15:00Z",
      "remediations": [
        {
          "category": "no_fix_planned",
          "date": "2026-07-28T11:56:52.270963Z",
          "details": "CVE-2021-0127 is a local-only CPU issue that requires an already authenticated user to run code on the target system and results solely in a denial of service, with no confidentiality or integrity impact. In enterprise server and VM deployments, this confines the blast radius to the affected host or guest and is typically recoverable by restart, without privilege escalation or data exposure. Given the lack of remote vector or cross-privilege impact, it is reasonable to deprioritize relative to vulnerabilities that enable code execution or data compromise.",
          "product_ids": [
            "Red-Hat-7:microcode_ctl-2:2.1-73.25.el7_9.tuxcare.els1.x86_64",
            "Red-Hat-7:microcode_ctl-2:2.1-73.25.el7_9.x86_64",
            "Red-Hat-7:microcode_ctl-2:2.1-73.26.el7_9.tuxcare.els1.x86_64",
            "Red-Hat-7:microcode_ctl-2:2.1-73.26.el7_9.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "LOW",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 2.1,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P",
            "version": "2.0"
          },
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "Red-Hat-7:microcode_ctl-2:2.1-73.25.el7_9.tuxcare.els1.x86_64",
            "Red-Hat-7:microcode_ctl-2:2.1-73.25.el7_9.x86_64",
            "Red-Hat-7:microcode_ctl-2:2.1-73.26.el7_9.tuxcare.els1.x86_64",
            "Red-Hat-7:microcode_ctl-2:2.1-73.26.el7_9.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ]
    }
  ]
}