CVE-2018-10901

Advisory lineage Upstream: 0 Downstream: 6
Modified
Published: 26 Jul 2018, 17:00
Last modified:05 Aug 2024, 07:54

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.0 (cve.org)
EPSS Score
0.16% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

26 Jul 2018, 17:00
Published
Vulnerability first disclosed
05 Aug 2024, 07:54
Last Modified
Vulnerability information updated

Description

A flaw was found in Linux kernel's KVM virtualization subsystem. The VMX code does not restore the GDT.LIMIT to the previous host value, but instead sets it to 64KB. With a corrupted GDT limit a host's userspace code has an ability to place malicious entries in the GDT, particularly to the per-cpu variables. An attacker can use this to escalate their privileges.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • v3.0•HIGH•Score: 7.8CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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: 0.16%• Percentile: 37%

Techniques & Countermeasures

  • CWE-665•Improper Initialization

    The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used.

Affected Systems

  • linux•linux_kernel

    < 2.6.36

  • redhat•enterprise_linux_desktop

    6.0

  • redhat•enterprise_linux_server

    6.0

  • redhat•enterprise_linux_server_aus

    6.4 | 6.5 | 6.6

  • redhat•enterprise_linux_workstation

    6.0

  • [unknown]•kernel:

    n/a

References (11)