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Red Hat: CVE-2018-18397: Important: kernel security, bug fix, and enhancement update (Multiple Advisories)

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Red Hat: CVE-2018-18397: Important: kernel security, bug fix, and enhancement update (Multiple Advisories)

Severity
2
CVSS
(AV:L/AC:L/Au:N/C:N/I:P/A:N)
Published
12/12/2018
Created
03/19/2019
Added
01/30/2019
Modified
03/03/2021

Description

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.

Solution(s)

  • redhat-upgrade-kernel

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