usn-5094-2
Vulnerability from osv_ubuntu
Published
2021-09-30 17:04
Modified
2026-06-03 10:45
Summary
linux-raspi2 vulnerabilities
Details

It was discovered that the KVM hypervisor implementation in the Linux kernel did not properly perform reference counting in some situations, leading to a use-after-free vulnerability. An attacker who could start and control a VM could possibly use this to expose sensitive information or execute arbitrary code. (CVE-2021-22543)

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)

Alois Wohlschlager discovered that the overlay file system in the Linux kernel did not restrict private clones in some situations. An attacker could use this to expose sensitive information. (CVE-2021-3732)

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)

It was discovered that the Xilinx 10/100 Ethernet Lite device driver in the Linux kernel could report pointer addresses in some situations. An attacker could use this information to ease the exploitation of another vulnerability. (CVE-2021-38205)

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-2021-3732",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-22543",
              "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": "CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L",
                  "type": "CVSS_V4"
                },
                {
                  "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"
                }
              ]
            },
            {
              "id": "CVE-2021-38205",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "linux-buildinfo-4.15.0-1096-raspi2",
            "binary_version": "4.15.0-1096.102"
          },
          {
            "binary_name": "linux-headers-4.15.0-1096-raspi2",
            "binary_version": "4.15.0-1096.102"
          },
          {
            "binary_name": "linux-image-4.15.0-1096-raspi2",
            "binary_version": "4.15.0-1096.102"
          },
          {
            "binary_name": "linux-modules-4.15.0-1096-raspi2",
            "binary_version": "4.15.0-1096.102"
          },
          {
            "binary_name": "linux-raspi2-headers-4.15.0-1096",
            "binary_version": "4.15.0-1096.102"
          },
          {
            "binary_name": "linux-raspi2-tools-4.15.0-1096",
            "binary_version": "4.15.0-1096.102"
          },
          {
            "binary_name": "linux-tools-4.15.0-1096-raspi2",
            "binary_version": "4.15.0-1096.102"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "linux-raspi2",
        "purl": "pkg:deb/ubuntu/linux-raspi2@4.15.0-1096.102?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.15.0-1096.102"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.13.0-1005.5",
        "4.13.0-1006.6",
        "4.13.0-1008.8",
        "4.15.0-1006.7",
        "4.15.0-1009.10",
        "4.15.0-1010.11",
        "4.15.0-1011.12",
        "4.15.0-1012.13",
        "4.15.0-1013.14",
        "4.15.0-1017.18",
        "4.15.0-1018.19",
        "4.15.0-1020.22",
        "4.15.0-1021.23",
        "4.15.0-1022.24",
        "4.15.0-1024.26",
        "4.15.0-1026.28",
        "4.15.0-1027.29",
        "4.15.0-1028.30",
        "4.15.0-1029.31",
        "4.15.0-1030.32",
        "4.15.0-1031.33",
        "4.15.0-1032.34",
        "4.15.0-1033.35",
        "4.15.0-1034.36",
        "4.15.0-1036.38",
        "4.15.0-1037.39",
        "4.15.0-1038.40",
        "4.15.0-1040.43",
        "4.15.0-1041.44",
        "4.15.0-1043.46",
        "4.15.0-1044.47",
        "4.15.0-1045.49",
        "4.15.0-1047.51",
        "4.15.0-1048.52",
        "4.15.0-1049.53",
        "4.15.0-1050.54",
        "4.15.0-1052.56",
        "4.15.0-1053.57",
        "4.15.0-1054.58",
        "4.15.0-1055.59",
        "4.15.0-1057.61",
        "4.15.0-1060.64",
        "4.15.0-1061.65",
        "4.15.0-1062.66",
        "4.15.0-1063.67",
        "4.15.0-1065.69",
        "4.15.0-1067.71",
        "4.15.0-1068.72",
        "4.15.0-1070.74",
        "4.15.0-1071.75",
        "4.15.0-1073.78",
        "4.15.0-1074.79",
        "4.15.0-1076.81",
        "4.15.0-1077.82",
        "4.15.0-1078.83",
        "4.15.0-1079.84",
        "4.15.0-1080.85",
        "4.15.0-1081.86",
        "4.15.0-1082.87",
        "4.15.0-1083.88",
        "4.15.0-1084.89",
        "4.15.0-1085.90",
        "4.15.0-1086.91",
        "4.15.0-1089.94",
        "4.15.0-1092.98",
        "4.15.0-1093.99",
        "4.15.0-1094.100",
        "4.15.0-1095.101"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that the KVM hypervisor implementation in the Linux\nkernel did not properly perform reference counting in some situations,\nleading to a use-after-free vulnerability. An attacker who could start and\ncontrol a VM could possibly use this to expose sensitive information or\nexecute arbitrary code. (CVE-2021-22543)\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\nAlois Wohlschlager discovered that the overlay file system in the Linux\nkernel did not restrict private clones in some situations. An attacker\ncould use this to expose sensitive information. (CVE-2021-3732)\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\nIt was discovered that the Xilinx 10/100 Ethernet Lite device driver in the\nLinux kernel could report pointer addresses in some situations. An attacker\ncould use this information to ease the exploitation of another\nvulnerability. (CVE-2021-38205)\n",
  "id": "USN-5094-2",
  "modified": "2026-06-03T10:45:26Z",
  "published": "2021-09-30T17:04:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5094-2"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-3679"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-3732"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-22543"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-38204"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-38205"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "linux-raspi2 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2021-3679",
    "UBUNTU-CVE-2021-3732",
    "UBUNTU-CVE-2021-22543",
    "UBUNTU-CVE-2021-38204",
    "UBUNTU-CVE-2021-38205"
  ]
}



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  • 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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