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Incorrect Authorization Affecting kernel-uek-firmware package, versions <0:4.1.12-124.24.5.el6uek

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-ORACLE6-KERNELUEKFIRMWARE-2542819
  • 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:6 kernel-uek-firmware to version 0:4.1.12-124.24.5.el6uek or higher.
This issue was patched in ELSA-2019-4528.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uek-firmware package and not the kernel-uek-firmware package as distributed by Oracle. See How to fix? for Oracle:6 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