Homepage

Improper Input Validation Affecting kernel-tools package, versions <0:3.10.0-957.5.1.el7

Severity

 Recommended
high

Based on CentOS security rating.

Threat Intelligence

Exploit Maturity
Mature
EPSS
0.04% (12th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications

Snyk Learn

Learn about Improper Input Validation vulnerabilities in an interactive lesson.

Start learning
  • Snyk IDSNYK-CENTOS7-KERNELTOOLS-2131671
  • published26 Jul 2021
  • disclosed26 Nov 2018
Report a new vulnerability Found a mistake?

Introduced: 26 Nov 2018

CVE-2018-18397  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade Centos:7 kernel-tools to version 0:3.10.0-957.5.1.el7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-tools package and not the kernel-tools package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

The userfaultfd implementation in the Linux kernel before 4.19.7 mishandles access control for certain UFFDIO_ ioctl calls, as demonstrated by allowing local users to write data into holes in a tmpfs file (if the user has read-only access to that file, and that file contains holes), related to fs/userfaultfd.c and mm/userfaultfd.c.