{
  "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-2021-33120-els_os-rhel7els.json"
      }
    ],
    "tracking": {
      "current_release_date": "2026-07-28T15:54:07Z",
      "generator": {
        "date": "2026-07-28T15:54:07Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CVE-2021-33120-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": "2026-07-28T15:54:07Z",
          "number": "2",
          "summary": "Official Publication"
        }
      ],
      "status": "final",
      "version": "2"
    },
    "title": "Security update on CVE-2021-33120"
  },
  "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"
          },
          {
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              {
                "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"
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                "category": "product_version",
                "name": "microcode_ctl-2:2.1-73.26.el7_9.x86_64",
                "product": {
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                  "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"
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                }
              },
              {
                "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-2021-33120",
      "cwe": {
        "id": "CWE-125",
        "name": "Out-of-bounds Read"
      },
      "notes": [
        {
          "category": "description",
          "text": "Out of bounds read under complex microarchitectural condition in memory subsystem for some Intel Atom(R) Processors may allow authenticated user to potentially enable information disclosure or cause denial of service via network 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-2021-33120"
        },
        {
          "category": "external",
          "summary": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00589.html",
          "url": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00589.html"
        }
      ],
      "release_date": "2022-02-09T23:15:00Z",
      "remediations": [
        {
          "category": "no_fix_planned",
          "date": "2026-07-28T11:56:50.635012Z",
          "details": "CVE-2021-33120 applies only to certain Intel Atom processors and requires an authenticated user to trigger a complex microarchitectural condition in the memory subsystem, which significantly reduces practical exploitability in centrally managed server and VM environments. Its impact is limited to low-grade information disclosure or service interruption, with no integrity impact and no privilege escalation. Given these constraints and the uncommon use of Atom-class CPUs in enterprise server or cloud hosts, this CVE can be safely deprioritized.",
          "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": "NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:L/Au:S/C:P/I:N/A:P",
            "version": "2.0"
          },
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L",
            "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"
        }
      ]
    }
  ]
}