Use After Free Affecting kernel-rt-devel package, versions <0:3.10.0-1160.36.2.rt56.1179.el7


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.02% (4th percentile)

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  • Snyk IDSNYK-RHEL7-KERNELRTDEVEL-1533401
  • published26 Jul 2021
  • disclosed4 Mar 2021

Introduced: 4 Mar 2021

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

How to fix?

Upgrade RHEL:7 kernel-rt-devel to version 0:3.10.0-1160.36.2.rt56.1179.el7 or higher.
This issue was patched in RHSA-2021:2726.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-devel package and not the kernel-rt-devel package as distributed by RHEL. See How to fix? for RHEL:7 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