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Incorrect Authorization Affecting kernel-uek-headers package, versions <0:4.14.35-1844.2.5.el7uek

Severity

 Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

Exploit Maturity
Mature
EPSS
0.04% (12th percentile)

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  • Snyk IDSNYK-ORACLE7-KERNELUEKHEADERS-2545696
  • published10 Apr 2022
  • disclosed12 Dec 2018
Report a new vulnerability Found a mistake?

Introduced: 12 Dec 2018

CVE-2018-18397  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

Upgrade Oracle:7 kernel-uek-headers to version 0:4.14.35-1844.2.5.el7uek or higher.
This issue was patched in ELSA-2019-4541.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uek-headers package and not the kernel-uek-headers package as distributed by Oracle. See How to fix? for Oracle: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.

References