Use After Free Affecting kernel-debug-devel package, versions <0:4.18.0-305.40.1.el8_4


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

Exploit Maturity
Mature
EPSS
0.05% (25th percentile)

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  • Snyk IDSNYK-RHEL8-KERNELDEBUGDEVEL-4160566
  • published14 Dec 2021
  • disclosed28 Jul 2021

Introduced: 28 Jul 2021

CVE-2021-0920  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:8 kernel-debug-devel to version 0:4.18.0-305.40.1.el8_4 or higher.
This issue was patched in RHSA-2022:0777.

NVD Description

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

In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References: Upstream kernel

CVSS Scores

version 3.1