{
  "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"
      }
    ],
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      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
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        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.tuxcare.com/csaf/v2/els_os/ubuntu16.04els/vex/2020/cve-2020-0549-els_os-ubuntu16_04els.json"
      }
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      "current_release_date": "2026-04-20T14:23:08Z",
      "generator": {
        "date": "2026-04-20T14:23:08Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CVE-2020-0549-ELS_OS-UBUNTU16.04ELS",
      "initial_release_date": "2020-01-28T01:15:00Z",
      "revision_history": [
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          "date": "2020-01-28T01:15:00Z",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-04-14T08:52:24Z",
          "number": "2",
          "summary": "Official Publication"
        },
        {
          "date": "2026-04-20T14:23:08Z",
          "number": "3",
          "summary": "Update document"
        }
      ],
      "status": "final",
      "version": "3"
    },
    "title": "Security update on CVE-2020-0549"
  },
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        "relates_to_product_reference": "Ubuntu-16"
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        },
        "product_reference": "linux-firmware-0:1.157.23-.all",
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  },
  "vulnerabilities": [
    {
      "cve": "CVE-2020-0549",
      "cwe": {
        "id": "CWE-404",
        "name": "Improper Resource Shutdown or Release"
      },
      "notes": [
        {
          "category": "description",
          "text": "Cleanup errors in some data cache evictions for some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure 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": [
          "Ubuntu-16:amd64-microcode-0:3.20230719.1ubuntu0.16.04.2+tuxcare.els1.amd64",
          "Ubuntu-16:amd64-microcode-0:3.20230719.1ubuntu0.16.04.2-.amd64",
          "Ubuntu-16:linux-firmware-0:1.157.23+tuxcare.els1.all",
          "Ubuntu-16:linux-firmware-0:1.157.23+tuxcare.els2.all",
          "Ubuntu-16:linux-firmware-0:1.157.23-.all"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2020-0549"
        },
        {
          "category": "external",
          "summary": "http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00016.html",
          "url": "http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00016.html"
        },
        {
          "category": "external",
          "summary": "https://kc.mcafee.com/corporate/index?page=content&id=SB10318",
          "url": "https://kc.mcafee.com/corporate/index?page=content&id=SB10318"
        },
        {
          "category": "external",
          "summary": "https://lists.debian.org/debian-lts-announce/2020/06/msg00019.html",
          "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00019.html"
        },
        {
          "category": "external",
          "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DT2VKDMQ3I37NBNJ256A2EXR7OJHXXKZ/",
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DT2VKDMQ3I37NBNJ256A2EXR7OJHXXKZ/"
        },
        {
          "category": "external",
          "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T5OUM24ZC43G4IDT3JUCIHJTSDXJSK6Y/",
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T5OUM24ZC43G4IDT3JUCIHJTSDXJSK6Y/"
        },
        {
          "category": "external",
          "summary": "https://security.netapp.com/advisory/ntap-20200210-0004/",
          "url": "https://security.netapp.com/advisory/ntap-20200210-0004/"
        },
        {
          "category": "external",
          "summary": "https://usn.ubuntu.com/4385-1/",
          "url": "https://usn.ubuntu.com/4385-1/"
        },
        {
          "category": "external",
          "summary": "https://www.debian.org/security/2020/dsa-4701",
          "url": "https://www.debian.org/security/2020/dsa-4701"
        },
        {
          "category": "external",
          "summary": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00329.html",
          "url": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00329.html"
        }
      ],
      "release_date": "2020-01-28T01:15:00Z",
      "remediations": [
        {
          "category": "no_fix_planned",
          "details": "CVE-2020-0549 (L1D Eviction Sampling/“CacheOut”) is a local-only speculative-execution side channel that requires attacker-controlled code to run on the same physical CPU core to observe transient L1D cache evictions, and it does not affect integrity or availability. In managed enterprise servers and VMs that do not allow untrusted local code—and given Intel microcode and OS/hypervisor mitigations available since 2020—the real‑world exploitability is low, so this issue can be safely deprioritized relative to remote or privilege‑escalation flaws.",
          "product_ids": [
            "Ubuntu-16:amd64-microcode-0:3.20230719.1ubuntu0.16.04.2+tuxcare.els1.amd64",
            "Ubuntu-16:amd64-microcode-0:3.20230719.1ubuntu0.16.04.2-.amd64",
            "Ubuntu-16:linux-firmware-0:1.157.23+tuxcare.els1.all",
            "Ubuntu-16:linux-firmware-0:1.157.23+tuxcare.els2.all",
            "Ubuntu-16:linux-firmware-0:1.157.23-.all"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "LOW",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 2.1,
            "baseSeverity": "LOW",
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "NONE",
            "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
            "version": "2.0"
          },
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "Ubuntu-16:amd64-microcode-0:3.20230719.1ubuntu0.16.04.2+tuxcare.els1.amd64",
            "Ubuntu-16:amd64-microcode-0:3.20230719.1ubuntu0.16.04.2-.amd64",
            "Ubuntu-16:linux-firmware-0:1.157.23+tuxcare.els1.all",
            "Ubuntu-16:linux-firmware-0:1.157.23+tuxcare.els2.all",
            "Ubuntu-16:linux-firmware-0:1.157.23-.all"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ]
    }
  ]
}