GHSA-4WH7-45G5-WCC8

Vulnerability from github – Published: 2022-05-13 01:34 – Updated: 2022-05-13 01:34
VLAI
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.

Severity
8.8 (High)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2018-16882"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-01-03T16:29:00Z",
    "severity": "HIGH"
  },
  "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": "GHSA-4wh7-45g5-wcc8",
  "modified": "2022-05-13T01:34:04Z",
  "published": "2022-05-13T01:34:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-16882"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16882"
    },
    {
      "type": "WEB",
      "url": "https://lwn.net/Articles/775720"
    },
    {
      "type": "WEB",
      "url": "https://lwn.net/Articles/775721"
    },
    {
      "type": "WEB",
      "url": "https://marc.info/?l=kvm\u0026m=154514994222809\u0026w=2"
    },
    {
      "type": "WEB",
      "url": "https://support.f5.com/csp/article/K80557033"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3871-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3871-3"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3871-4"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3871-5"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3872-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3878-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3878-2"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/106254"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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