Use After Free Affecting kernel-tools-libs-devel package, versions <0:4.18.0-348.el8


Severity

Recommended
medium

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.57% (43rd percentile)

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  • Snyk IDSNYK-ALMALINUX8-KERNELTOOLSLIBSDEVEL-5658512
  • published28 May 2023
  • disclosed9 Nov 2021

Introduced: 9 Nov 2021

CVE-2021-33033  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 kernel-tools-libs-devel to version 0:4.18.0-348.el8 or higher.
This issue was patched in ALSA-2021:4356.

NVD Description

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

The Linux kernel before 5.11.14 has a use-after-free in cipso_v4_genopt in net/ipv4/cipso_ipv4.c because the CIPSO and CALIPSO refcounting for the DOI definitions is mishandled, aka CID-ad5d07f4a9cd. This leads to writing an arbitrary value.

CVSS Base Scores

version 3.1