usn-4984-1
Vulnerability from osv_ubuntu
Published
2021-06-08 02:05
Modified
2026-06-03 10:45
Summary
linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.8, linux-kvm, linux-oracle, linux-raspi vulnerabilities
Details

Jan Beulich discovered that the Xen netback backend in the Linux kernel did not properly handle certain error conditions under paravirtualization. An attacker in a guest VM could possibly use this to cause a denial of service (host domain crash). (CVE-2021-28038)

It was discovered that the Realtek RTL8188EU Wireless device driver in the Linux kernel did not properly validate ssid lengths in some situations. An attacker could use this to cause a denial of service (system crash). (CVE-2021-28660)

It was discovered that the Xen paravirtualization backend in the Linux kernel did not properly deallocate memory in some situations. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2021-28688)

It was discovered that the fuse user space file system implementation in the Linux kernel did not properly handle bad inodes in some situations. A local attacker could possibly use this to cause a denial of service. (CVE-2021-28950)

John Stultz discovered that the audio driver for Qualcomm SDM845 systems in the Linux kernel did not properly validate port ID numbers. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-28952)

Zygo Blaxell discovered that the btrfs file system implementation in the Linux kernel contained a race condition during certain cloning operations. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2021-28964)

Vince Weaver discovered that the perf subsystem in the Linux kernel did not properly handle certain PEBS records properly for some Intel Haswell processors. A local attacker could use this to cause a denial of service (system crash). (CVE-2021-28971)

It was discovered that the RPA PCI Hotplug driver implementation in the Linux kernel did not properly handle device name writes via sysfs, leading to a buffer overflow. A privileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-28972)

It was discovered that the Qualcomm IPC router implementation in the Linux kernel did not properly initialize memory passed to user space. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2021-29647)

Arnd Bergmann discovered that the video4linux subsystem in the Linux kernel did not properly deallocate memory in some situations. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2021-30002)

Dan Carpenter discovered that the block device manager (dm) implementation in the Linux kernel contained a buffer overflow in the ioctl for listing devices. A privileged local attacker could use this to cause a denial of service (system crash). (CVE-2021-31916)

It was discovered that the CIPSO implementation in the Linux kernel did not properly perform reference counting in some situations, leading to use- after-free vulnerabilities. An attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-33033)

马哲宇 discovered that the IEEE 1394 (Firewire) nosy packet sniffer driver in the Linux kernel did not properly perform reference counting in some situations, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-3483)

References
To clipboard 

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      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "linux-hwe-5.8",
        "purl": "pkg:deb/ubuntu/linux-hwe-5.8@5.8.0-55.62~20.04.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.8.0-55.62~20.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.8.0-23.24~20.04.1",
        "5.8.0-25.26~20.04.1",
        "5.8.0-28.30~20.04.1",
        "5.8.0-29.31~20.04.1",
        "5.8.0-31.33~20.04.1",
        "5.8.0-33.36~20.04.1",
        "5.8.0-34.37~20.04.2",
        "5.8.0-36.40~20.04.1",
        "5.8.0-38.43~20.04.1",
        "5.8.0-40.45~20.04.1",
        "5.8.0-41.46~20.04.1",
        "5.8.0-43.49~20.04.1",
        "5.8.0-44.50~20.04.1",
        "5.8.0-45.51~20.04.1",
        "5.8.0-48.54~20.04.1",
        "5.8.0-49.55~20.04.1",
        "5.8.0-50.56~20.04.1",
        "5.8.0-53.60~20.04.1"
      ]
    }
  ],
  "aliases": [],
  "details": "Jan Beulich discovered that the Xen netback backend in the Linux kernel did\nnot properly handle certain error conditions under paravirtualization. An\nattacker in a guest VM could possibly use this to cause a denial of service\n(host domain crash). (CVE-2021-28038)\n\nIt was discovered that the Realtek RTL8188EU Wireless device driver in the\nLinux kernel did not properly validate ssid lengths in some situations. An\nattacker could use this to cause a denial of service (system crash).\n(CVE-2021-28660)\n\nIt was discovered that the Xen paravirtualization backend in the Linux\nkernel did not properly deallocate memory in some situations. A local\nattacker could use this to cause a denial of service (memory exhaustion).\n(CVE-2021-28688)\n\nIt was discovered that the fuse user space file system implementation in\nthe Linux kernel did not properly handle bad inodes in some situations. A\nlocal attacker could possibly use this to cause a denial of service.\n(CVE-2021-28950)\n\nJohn Stultz discovered that the audio driver for Qualcomm SDM845 systems in\nthe Linux kernel did not properly validate port ID numbers. A local\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code. (CVE-2021-28952)\n\nZygo Blaxell discovered that the btrfs file system implementation in the\nLinux kernel contained a race condition during certain cloning operations.\nA local attacker could possibly use this to cause a denial of service\n(system crash). (CVE-2021-28964)\n\nVince Weaver discovered that the perf subsystem in the Linux kernel did not\nproperly handle certain PEBS records properly for some Intel Haswell\nprocessors. A local attacker could use this to cause a denial of service\n(system crash). (CVE-2021-28971)\n\nIt was discovered that the RPA PCI Hotplug driver implementation in the\nLinux kernel did not properly handle device name writes via sysfs, leading\nto a buffer overflow. A privileged attacker could use this to cause a\ndenial of service (system crash) or possibly execute arbitrary code.\n(CVE-2021-28972)\n\nIt was discovered that the Qualcomm IPC router implementation in the Linux\nkernel did not properly initialize memory passed to user space. A local\nattacker could use this to expose sensitive information (kernel memory).\n(CVE-2021-29647)\n\nArnd Bergmann discovered that the video4linux subsystem in the Linux kernel\ndid not properly deallocate memory in some situations. A local attacker\ncould use this to cause a denial of service (memory exhaustion).\n(CVE-2021-30002)\n\nDan Carpenter discovered that the block device manager (dm) implementation\nin the Linux kernel contained a buffer overflow in the ioctl for listing\ndevices. A privileged local attacker could use this to cause a denial of\nservice (system crash). (CVE-2021-31916)\n\nIt was discovered that the CIPSO implementation in the Linux kernel did not\nproperly perform reference counting in some situations, leading to use-\nafter-free vulnerabilities. An attacker could use this to cause a denial of\nservice (system crash) or possibly execute arbitrary code. (CVE-2021-33033)\n\n\u9a6c\u54f2\u5b87 discovered that the IEEE 1394 (Firewire) nosy packet sniffer driver in\nthe Linux kernel did not properly perform reference counting in some\nsituations, leading to a use-after-free vulnerability. A local attacker\ncould use this to cause a denial of service (system crash) or possibly\nexecute arbitrary code. (CVE-2021-3483)\n",
  "id": "USN-4984-1",
  "modified": "2026-06-03T10:45:26Z",
  "published": "2021-06-08T02:05:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4984-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-3483"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-28038"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-28660"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-28688"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-28950"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-28952"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-28964"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-28971"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-28972"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-29647"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-30002"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-31916"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-33033"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.8, linux-kvm, linux-oracle, linux-raspi vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2021-3483",
    "UBUNTU-CVE-2021-28038",
    "UBUNTU-CVE-2021-28660",
    "UBUNTU-CVE-2021-28688",
    "UBUNTU-CVE-2021-28950",
    "UBUNTU-CVE-2021-28952",
    "UBUNTU-CVE-2021-28964",
    "UBUNTU-CVE-2021-28971",
    "UBUNTU-CVE-2021-28972",
    "UBUNTU-CVE-2021-29647",
    "UBUNTU-CVE-2021-30002",
    "UBUNTU-CVE-2021-31916",
    "UBUNTU-CVE-2021-33033"
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • 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.