usn-5206-1
Vulnerability from osv_ubuntu
Published
2022-01-05 17:31
Modified
2026-06-03 10:45
Summary
linux-oem-5.14 vulnerability
Details

Nadav Amit discovered that the hugetlb implementation in the Linux kernel did not perform TLB flushes under certain conditions. A local attacker could use this to leak or alter data from other processes that use huge pages.

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-4002",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "linux-buildinfo-5.14.0-1013-oem",
            "binary_version": "5.14.0-1013.13"
          },
          {
            "binary_name": "linux-headers-5.14.0-1013-oem",
            "binary_version": "5.14.0-1013.13"
          },
          {
            "binary_name": "linux-image-unsigned-5.14.0-1013-oem",
            "binary_version": "5.14.0-1013.13"
          },
          {
            "binary_name": "linux-modules-5.14.0-1013-oem",
            "binary_version": "5.14.0-1013.13"
          },
          {
            "binary_name": "linux-oem-5.14-headers-5.14.0-1013",
            "binary_version": "5.14.0-1013.13"
          },
          {
            "binary_name": "linux-oem-5.14-tools-5.14.0-1013",
            "binary_version": "5.14.0-1013.13"
          },
          {
            "binary_name": "linux-oem-5.14-tools-host",
            "binary_version": "5.14.0-1013.13"
          },
          {
            "binary_name": "linux-tools-5.14.0-1013-oem",
            "binary_version": "5.14.0-1013.13"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "linux-oem-5.14",
        "purl": "pkg:deb/ubuntu/linux-oem-5.14@5.14.0-1013.13?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.14.0-1013.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.14.0-1004.4",
        "5.14.0-1005.5",
        "5.14.0-1007.7",
        "5.14.0-1008.8",
        "5.14.0-1010.10",
        "5.14.0-1011.11"
      ]
    }
  ],
  "aliases": [],
  "details": "Nadav Amit discovered that the hugetlb implementation in the Linux kernel\ndid not perform TLB flushes under certain conditions. A local attacker\ncould use this to leak or alter data from other processes that use huge\npages.\n",
  "id": "USN-5206-1",
  "modified": "2026-06-03T10:45:27Z",
  "published": "2022-01-05T17:31:03Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5206-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-4002"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "linux-oem-5.14 vulnerability",
  "upstream": [
    "UBUNTU-CVE-2021-4002"
  ]
}



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Sightings

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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.
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  • 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.