GHSA-5XG6-R8MX-769H

Vulnerability from github – Published: 2022-05-24 16:56 – Updated: 2024-02-16 21:31
VLAI?
Details

An out-of-bounds access issue was found in the Linux kernel, all versions through 5.3, in the way Linux kernel's KVM hypervisor implements the Coalesced MMIO write operation. It operates on an MMIO ring buffer 'struct kvm_coalesced_mmio' object, wherein write indices 'ring->first' and 'ring->last' value could be supplied by a host user-space process. An unprivileged host user or process with access to '/dev/kvm' device could use this flaw to crash the host kernel, resulting in a denial of service or potentially escalating privileges on the system.

Severity ?
8.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2019-14821"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-09-19T18:15:00Z",
    "severity": "HIGH"
  },
  "details": "An out-of-bounds access issue was found in the Linux kernel, all versions through 5.3, in the way Linux kernel\u0027s KVM hypervisor implements the Coalesced MMIO write operation. It operates on an MMIO ring buffer \u0027struct kvm_coalesced_mmio\u0027 object, wherein write indices \u0027ring-\u003efirst\u0027 and \u0027ring-\u003elast\u0027 value could be supplied by a host user-space process. An unprivileged host user or process with access to \u0027/dev/kvm\u0027 device could use this flaw to crash the host kernel, resulting in a denial of service or potentially escalating privileges on the system.",
  "id": "GHSA-5xg6-r8mx-769h",
  "modified": "2024-02-16T21:31:30Z",
  "published": "2022-05-24T16:56:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-14821"
    },
    {
      "type": "WEB",
      "url": "https://www.oracle.com/security-alerts/cpuapr2020.html"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2019/dsa-4531"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/4163-2"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/4163-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/4162-2"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/4162-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/4157-2"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/4157-1"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20191004-0001"
    },
    {
      "type": "WEB",
      "url": "https://seclists.org/bugtraq/2019/Sep/41"
    },
    {
      "type": "WEB",
      "url": "https://seclists.org/bugtraq/2019/Nov/11"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YW3QNMPENPFEGVTOFPSNOBL7JEIJS25P"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TRZQQQANZWQMPILZV7OTS3RGGRLLE2Q7"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YW3QNMPENPFEGVTOFPSNOBL7JEIJS25P"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRZQQQANZWQMPILZV7OTS3RGGRLLE2Q7"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2019/10/msg00000.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2019/09/msg00025.html"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14821"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1746708"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2019-14821"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2020:2851"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2020:0204"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2020:0027"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:4256"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:4154"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:3979"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:3978"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:3517"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:3309"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00036.html"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00037.html"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/155212/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2019/09/20/1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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