CVE-2018-14678

Aliases:DEBIAN-CVE-2018-14678
Advisory lineage Upstream: 0 Downstream: 11
Modified
Published: 28 Jul 2018, 18:00
Last modified:05 Aug 2024, 09:38

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
0.41% LOW
0% probability +0.32%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

28 Jul 2018, 18:00
Published
Vulnerability first disclosed
05 Aug 2024, 09:38
Last Modified
Vulnerability information updated

Description

An issue was discovered in the Linux kernel through 4.17.11, as used in Xen through 4.11.x. The xen_failsafe_callback entry point in arch/x86/entry/entry_64.S does not properly maintain RBX, which allows local users to cause a denial of service (uninitialized memory usage and system crash). Within Xen, 64-bit x86 PV Linux guest OS users can trigger a guest OS crash or possibly gain 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
  • v2.0•HIGH•Score: 7.2AV:L/AC:L/Au:N/C:C/I:C/A:C

EPSS Trends

Current EPSS score: 0.41%• Percentile: 35%

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

  • canonical•ubuntu_linux

    14.04 | 16.04 | 18.04

  • debian•linux

    < 4.17.14-1 | < 4.17.14-1 | < 4.17.14-1 | < 4.17.14-1

  • debian•debian_linux

    8.0 | 9.0

  • linux•linux_kernel

    ≥ 4.14.21, < 4.14.61 | ≥ 4.15.5, < 4.17.13

  • xen•xen

    ≤ 4.11.0

References (8)