Use After Free Affecting kernel-uek package, versions <0:5.4.17-2036.101.2.el8uek


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.43% (35th percentile)

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  • Snyk IDSNYK-ORACLE8-KERNELUEK-2577908
  • published10 Apr 2022
  • disclosed2 Dec 2020

Introduced: 2 Dec 2020

CVE-2020-25656  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Oracle:8 kernel-uek to version 0:5.4.17-2036.101.2.el8uek or higher.
This issue was patched in ELSA-2020-5996.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uek package and not the kernel-uek package as distributed by Oracle. See How to fix? for Oracle:8 relevant fixed versions and status.

A flaw was found in the Linux kernel. A use-after-free was found in the way the console subsystem was using ioctls KDGKBSENT and KDSKBSENT. A local user could use this flaw to get read memory access out of bounds. The highest threat from this vulnerability is to data confidentiality.

CVSS Base Scores

version 3.1