USN-4465-1 (UBUNTU-CVE-2020-12655)

Vulnerability from osv_ubuntu – Published: 2020-08-23 04:11 – Updated: 2026-06-03 10:45 – Source website
VLAI
Summary
linux-hwe, linux-aws-5.3, linux-azure-5.3, linux-gke-5.3 vulnerabilities
Details

It was discovered that the XFS file system implementation in the Linux kernel did not properly validate meta data in some circumstances. An attacker could use this to construct a malicious XFS image that, when mounted, could cause a denial of service. (CVE-2020-12655)

It was discovered that the bcache subsystem in the Linux kernel did not properly release a lock in some error conditions. A local attacker could possibly use this to cause a denial of service. (CVE-2020-12771)

Kyungtae Kim discovered that the USB testing driver in the Linux kernel did not properly deallocate memory on disconnect events. A physically proximate attacker could use this to cause a denial of service (memory exhaustion). (CVE-2020-15393)

References
To clipboard 

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          },
          {
            "binary_name": "vlan-modules-5.3.0-65-generic-di",
            "binary_version": "5.3.0-65.59"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "linux-hwe",
        "purl": "pkg:deb/ubuntu/linux-hwe@5.3.0-65.59?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.3.0-65.59"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.18.0-13.14~18.04.1",
        "4.18.0-14.15~18.04.1",
        "4.18.0-15.16~18.04.1",
        "4.18.0-16.17~18.04.1",
        "4.18.0-17.18~18.04.1",
        "4.18.0-18.19~18.04.1",
        "4.18.0-20.21~18.04.1",
        "4.18.0-21.22~18.04.1",
        "4.18.0-22.23~18.04.1",
        "4.18.0-24.25~18.04.1",
        "4.18.0-25.26~18.04.1",
        "5.0.0-23.24~18.04.1",
        "5.0.0-25.26~18.04.1",
        "5.0.0-27.28~18.04.1",
        "5.0.0-29.31~18.04.1",
        "5.0.0-31.33~18.04.1",
        "5.0.0-32.34~18.04.2",
        "5.0.0-35.38~18.04.1",
        "5.0.0-36.39~18.04.1",
        "5.0.0-37.40~18.04.1",
        "5.3.0-26.28~18.04.1",
        "5.3.0-28.30~18.04.1",
        "5.3.0-40.32~18.04.1",
        "5.3.0-42.34~18.04.1",
        "5.3.0-45.37~18.04.1",
        "5.3.0-46.38~18.04.1",
        "5.3.0-51.44~18.04.2",
        "5.3.0-53.47~18.04.1",
        "5.3.0-59.53~18.04.1",
        "5.3.0-61.55~18.04.1",
        "5.3.0-62.56~18.04.1",
        "5.3.0-64.58~18.04.1"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that the XFS file system implementation in the Linux\nkernel did not properly validate meta data in some circumstances. An\nattacker could use this to construct a malicious XFS image that, when\nmounted, could cause a denial of service. (CVE-2020-12655)\n\nIt was discovered that the bcache subsystem in the Linux kernel did not\nproperly release a lock in some error conditions. A local attacker could\npossibly use this to cause a denial of service. (CVE-2020-12771)\n\nKyungtae Kim discovered that the USB testing driver in the Linux kernel did\nnot properly deallocate memory on disconnect events. A physically proximate\nattacker could use this to cause a denial of service (memory exhaustion).\n(CVE-2020-15393)\n",
  "id": "USN-4465-1",
  "modified": "2026-06-03T10:45:22Z",
  "published": "2020-08-23T04:11:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4465-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-12655"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-12771"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-15393"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-24394"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "linux-hwe, linux-aws-5.3, linux-azure-5.3, linux-gke-5.3  vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2020-12655",
    "UBUNTU-CVE-2020-12771",
    "UBUNTU-CVE-2020-15393",
    "UBUNTU-CVE-2020-24394"
  ]
}



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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

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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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.