Race Condition Affecting kernel-uek-devel package, versions <0:4.1.12-124.60.1.el7uek


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-ORACLE7-KERNELUEKDEVEL-2604681
  • published10 Apr 2022
  • disclosed18 Feb 2022

Introduced: 18 Feb 2022

CVE-2021-20321  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade Oracle:7 kernel-uek-devel to version 0:4.1.12-124.60.1.el7uek or higher.
This issue was patched in ELSA-2022-9088.

NVD Description

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

A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.

CVSS Scores

version 3.1