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GSD-2018-16882

Vulnerability from gsd - Updated: 2023-12-13 01:22
Details
A use-after-free issue was found in the way the Linux kernel's KVM hypervisor processed posted interrupts when nested(=1) virtualization is enabled. In nested_get_vmcs12_pages(), in case of an error while processing posted interrupt address, it unmaps the 'pi_desc_page' without resetting 'pi_desc' descriptor address, which is later used in pi_test_and_clear_on(). A guest user/process could use this flaw to crash the host kernel resulting in DoS or potentially gain privileged access to a system. Kernel versions before 4.14.91 and before 4.19.13 are vulnerable.
Aliases
Aliases
CVE-2018-16882
To clipboard 

{
  "GSD": {
    "alias": "CVE-2018-16882",
    "description": "A use-after-free issue was found in the way the Linux kernel\u0027s KVM hypervisor processed posted interrupts when nested(=1) virtualization is enabled. In nested_get_vmcs12_pages(), in case of an error while processing posted interrupt address, it unmaps the \u0027pi_desc_page\u0027 without resetting \u0027pi_desc\u0027 descriptor address, which is later used in pi_test_and_clear_on(). A guest user/process could use this flaw to crash the host kernel resulting in DoS or potentially gain privileged access to a system. Kernel versions before 4.14.91 and before 4.19.13 are vulnerable.",
    "id": "GSD-2018-16882",
    "references": [
      "https://www.suse.com/security/cve/CVE-2018-16882.html",
      "https://ubuntu.com/security/CVE-2018-16882",
      "https://advisories.mageia.org/CVE-2018-16882.html",
      "https://linux.oracle.com/cve/CVE-2018-16882.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2018-16882"
      ],
      "details": "A use-after-free issue was found in the way the Linux kernel\u0027s KVM hypervisor processed posted interrupts when nested(=1) virtualization is enabled. In nested_get_vmcs12_pages(), in case of an error while processing posted interrupt address, it unmaps the \u0027pi_desc_page\u0027 without resetting \u0027pi_desc\u0027 descriptor address, which is later used in pi_test_and_clear_on(). A guest user/process could use this flaw to crash the host kernel resulting in DoS or potentially gain privileged access to a system. Kernel versions before 4.14.91 and before 4.19.13 are vulnerable.",
      "id": "GSD-2018-16882",
      "modified": "2023-12-13T01:22:26.052911Z",
      "schema_version": "1.4.0"
    }
  },
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          "impactScore": 6.0
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      },
      "lastModifiedDate": "2023-01-19T16:04Z",
      "publishedDate": "2019-01-03T16:29Z"
    }
  }
}



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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.


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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.