CVE-2019-14821

Advisory lineage Upstream: 0 Downstream: 38
Modified
Published: 19 Sept 2019, 17:37
Last modified:05 Aug 2024, 00:26

Vulnerability Summary

Overall Risk (default)
medium
35/100
CVSS Score
8.8 HIGH
v3.1 (nvd)
EPSS Score
0.11% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

19 Sept 2019, 17:37
Published
Vulnerability first disclosed
05 Aug 2024, 00:26
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•HIGH•Score: 8.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
  • v3.0•HIGH•Score: 7.5CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H
  • v2.0•HIGH•Score: 7.2AV:L/AC:L/Au:N/C:C/I:C/A:C

EPSS Trends

Current EPSS score: 0.11%• Percentile: 28%

Techniques & Countermeasures

  • CWE-787•Out-of-bounds Write

    The product writes data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • canonical•ubuntu_linux

    14.04 | 16.04 | 18.04 | 19.04

  • debian•debian_linux

    8.0 | 9.0 | 10.0

  • fedoraproject•fedora

    29 | 30

  • Unknown•Kernel

    all through 5.3

  • linux•linux_kernel

    ≥ 2.6.27, ≤ 3.15.10 | ≥ 3.16, < 3.16.74 | ≥ 4.4, < 4.4.194 | ≥ 4.9, < 4.9.194 | ≥ 4.14, < 4.14.146 | ≥ 4.19, < 4.19.75 | ≥ 5.2, < 5.2.17 | ≥ 5.3, < 5.3.1 | 5.4:rc1

  • netapp•aff_a700s

    na

  • netapp•data_availability_services

    na

  • netapp•h300e

    na

  • netapp•h300s_firmware

    na

  • netapp•h410c_firmware

    na

  • netapp•h410s_firmware

    na

  • netapp•h500e

    na

  • netapp•h500s_firmware

    na

  • netapp•h610s_firmware

    na

  • netapp•h700e

    na

  • netapp•h700s_firmware

    na

  • netapp•hci_management_node

    na

  • netapp•solidfire

    na

  • opensuse•leap

    15.0 | 15.1

  • oracle•sd-wan_edge

    7.3 | 8.0 | 8.1 | 8.2

  • redhat•enterprise_linux

    8.0

  • redhat•enterprise_linux_desktop

    6.0 | 7.0

  • redhat•enterprise_linux_eus

    7.7

  • redhat•enterprise_linux_for_real_time

    7 | 8

  • redhat•enterprise_linux_server

    6.0 | 7.0

  • redhat•enterprise_linux_server_aus

    7.7

  • redhat•enterprise_linux_server_tus

    7.7

  • redhat•enterprise_linux_workstation

    6.0 | 7.0

  • redhat•virtualization_host

    4.0

References (29)