usn-4303-2
Vulnerability from osv_ubuntu
Published
2020-03-17 01:41
Modified
2026-06-03 10:45
Summary
linux-lts-xenial, linux-aws vulnerability
Details

USN-4303-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 ESM.

Paulo Bonzini discovered that the KVM hypervisor implementation in the Linux kernel could improperly let a nested (level 2) guest access the resources of a parent (level 1) guest in certain situations. An attacker could use this to expose sensitive information.

References
To clipboard 

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  "aliases": [],
  "details": "USN-4303-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04\nLTS. This update provides the corresponding updates for the Linux\nHardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu\n14.04 ESM.\n\nPaulo Bonzini discovered that the KVM hypervisor implementation in the\nLinux kernel could improperly let a nested (level 2) guest access the\nresources of a parent (level 1) guest in certain situations. An attacker\ncould use this to expose sensitive information.\n",
  "id": "USN-4303-2",
  "modified": "2026-06-03T10:45:20Z",
  "published": "2020-03-17T01:41:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4303-2"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-2732"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "linux-lts-xenial, linux-aws vulnerability",
  "upstream": [
    "UBUNTU-CVE-2020-2732"
  ]
}



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Tags
Taxonomy of the tags.





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.