Use After Free Affecting kernel-modules-extra package, versions <0:4.18.0-240.el8


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.54% (78th percentile)

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  • Snyk IDSNYK-RHEL8-KERNELMODULESEXTRA-1443404
  • published26 Jul 2021
  • disclosed10 Dec 2019

Introduced: 10 Dec 2019

CVE-2019-19447  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:8 kernel-modules-extra to version 0:4.18.0-240.el8 or higher.
This issue was patched in RHSA-2020:4431.

NVD Description

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

In the Linux kernel 5.0.21, mounting a crafted ext4 filesystem image, performing some operations, and unmounting can lead to a use-after-free in ext4_put_super in fs/ext4/super.c, related to dump_orphan_list in fs/ext4/super.c.

CVSS Scores

version 3.1