usn-5091-2
Vulnerability from osv_ubuntu
Published
2021-09-30 15:51
Modified
2026-06-03 10:45
Summary
linux-raspi, linux-raspi-5.4 vulnerabilities
Details

Ofek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk discovered that the BPF verifier in the Linux kernel missed possible mispredicted branches due to type confusion, allowing a side-channel attack. An attacker could use this to expose sensitive information. (CVE-2021-33624)

It was discovered that the tracing subsystem in the Linux kernel did not properly keep track of per-cpu ring buffer state. A privileged attacker could use this to cause a denial of service. (CVE-2021-3679)

It was discovered that the Virtio console implementation in the Linux kernel did not properly validate input lengths in some situations. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2021-38160)

Michael Wakabayashi discovered that the NFSv4 client implementation in the Linux kernel did not properly order connection setup operations. An attacker controlling a remote NFS server could use this to cause a denial of service on the client. (CVE-2021-38199)

It was discovered that the MAX-3421 host USB device driver in the Linux kernel did not properly handle device removal events. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2021-38204)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-3679",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-33624",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-38160",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-38199",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-38204",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "linux-buildinfo-5.4.0-1044-raspi",
            "binary_version": "5.4.0-1044.48~18.04.1"
          },
          {
            "binary_name": "linux-headers-5.4.0-1044-raspi",
            "binary_version": "5.4.0-1044.48~18.04.1"
          },
          {
            "binary_name": "linux-image-5.4.0-1044-raspi",
            "binary_version": "5.4.0-1044.48~18.04.1"
          },
          {
            "binary_name": "linux-modules-5.4.0-1044-raspi",
            "binary_version": "5.4.0-1044.48~18.04.1"
          },
          {
            "binary_name": "linux-raspi-5.4-headers-5.4.0-1044",
            "binary_version": "5.4.0-1044.48~18.04.1"
          },
          {
            "binary_name": "linux-raspi-5.4-tools-5.4.0-1044",
            "binary_version": "5.4.0-1044.48~18.04.1"
          },
          {
            "binary_name": "linux-tools-5.4.0-1044-raspi",
            "binary_version": "5.4.0-1044.48~18.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "linux-raspi-5.4",
        "purl": "pkg:deb/ubuntu/linux-raspi-5.4@5.4.0-1044.48~18.04.1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.4.0-1044.48~18.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.4.0-1013.13~18.04.1",
        "5.4.0-1015.15~18.04.1",
        "5.4.0-1016.17~18.04.1",
        "5.4.0-1018.20~18.04.1",
        "5.4.0-1019.21~18.04.1",
        "5.4.0-1021.24~18.04.1",
        "5.4.0-1022.25~18.04.1",
        "5.4.0-1023.26~18.04.1",
        "5.4.0-1025.28~18.04.1",
        "5.4.0-1026.29~18.04.1",
        "5.4.0-1028.31~18.04.1",
        "5.4.0-1029.32~18.04.1",
        "5.4.0-1030.33~18.04.1",
        "5.4.0-1032.35~18.04.1",
        "5.4.0-1033.36~18.04.1",
        "5.4.0-1034.37~18.04.1",
        "5.4.0-1035.38~18.04.1",
        "5.4.0-1036.39~18.04.1",
        "5.4.0-1038.41~18.04.1",
        "5.4.0-1041.45~18.04.1",
        "5.4.0-1042.46~18.04.3",
        "5.4.0-1043.47~18.04.1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-3679",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-33624",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-38160",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-38199",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-38204",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "linux-buildinfo-5.4.0-1044-raspi",
            "binary_version": "5.4.0-1044.48"
          },
          {
            "binary_name": "linux-headers-5.4.0-1044-raspi",
            "binary_version": "5.4.0-1044.48"
          },
          {
            "binary_name": "linux-image-5.4.0-1044-raspi",
            "binary_version": "5.4.0-1044.48"
          },
          {
            "binary_name": "linux-modules-5.4.0-1044-raspi",
            "binary_version": "5.4.0-1044.48"
          },
          {
            "binary_name": "linux-raspi-headers-5.4.0-1044",
            "binary_version": "5.4.0-1044.48"
          },
          {
            "binary_name": "linux-raspi-tools-5.4.0-1044",
            "binary_version": "5.4.0-1044.48"
          },
          {
            "binary_name": "linux-tools-5.4.0-1044-raspi",
            "binary_version": "5.4.0-1044.48"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "linux-raspi",
        "purl": "pkg:deb/ubuntu/linux-raspi@5.4.0-1044.48?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.4.0-1044.48"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.4.0-1007.7",
        "5.4.0-1008.8",
        "5.4.0-1011.11",
        "5.4.0-1012.12",
        "5.4.0-1013.13",
        "5.4.0-1015.15",
        "5.4.0-1016.17",
        "5.4.0-1018.20",
        "5.4.0-1019.21",
        "5.4.0-1021.24",
        "5.4.0-1022.25",
        "5.4.0-1023.26",
        "5.4.0-1025.28",
        "5.4.0-1026.29",
        "5.4.0-1028.31",
        "5.4.0-1029.32",
        "5.4.0-1030.33",
        "5.4.0-1032.35",
        "5.4.0-1033.36",
        "5.4.0-1034.37",
        "5.4.0-1035.38",
        "5.4.0-1036.39",
        "5.4.0-1038.41",
        "5.4.0-1041.45",
        "5.4.0-1042.46",
        "5.4.0-1043.47"
      ]
    }
  ],
  "aliases": [],
  "details": "Ofek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk\ndiscovered that the BPF verifier in the Linux kernel missed possible\nmispredicted branches due to type confusion, allowing a side-channel\nattack. An attacker could use this to expose sensitive information.\n(CVE-2021-33624)\n\nIt was discovered that the tracing subsystem in the Linux kernel did not\nproperly keep track of per-cpu ring buffer state. A privileged attacker\ncould use this to cause a denial of service. (CVE-2021-3679)\n\nIt was discovered that the Virtio console implementation in the Linux\nkernel did not properly validate input lengths in some situations. A local\nattacker could possibly use this to cause a denial of service (system\ncrash). (CVE-2021-38160)\n\nMichael Wakabayashi discovered that the NFSv4 client implementation in the\nLinux kernel did not properly order connection setup operations. An\nattacker controlling a remote NFS server could use this to cause a denial\nof service on the client. (CVE-2021-38199)\n\nIt was discovered that the MAX-3421 host USB device driver in the Linux\nkernel did not properly handle device removal events. A physically\nproximate attacker could use this to cause a denial of service (system\ncrash). (CVE-2021-38204)\n",
  "id": "USN-5091-2",
  "modified": "2026-06-03T10:45:26Z",
  "published": "2021-09-30T15:51:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5091-2"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-3679"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-33624"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-38160"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-38199"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-38204"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "linux-raspi, linux-raspi-5.4 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2021-3679",
    "UBUNTU-CVE-2021-33624",
    "UBUNTU-CVE-2021-38160",
    "UBUNTU-CVE-2021-38199",
    "UBUNTU-CVE-2021-38204"
  ]
}



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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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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