Access of Resource Using Incompatible Type ('Type Confusion') Affecting kernel-rt-modules-extra package, versions <0:4.18.0-513.5.1.rt7.307.el8_9


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.05% (16th percentile)

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  • Snyk IDSNYK-RHEL8-KERNELRTMODULESEXTRA-3317674
  • published9 Feb 2023
  • disclosed1 Jan 2023

Introduced: 1 Jan 2023

CVE-2023-23455  (opens in a new tab)
CWE-843  (opens in a new tab)

How to fix?

Upgrade RHEL:8 kernel-rt-modules-extra to version 0:4.18.0-513.5.1.rt7.307.el8_9 or higher.
This issue was patched in RHSA-2023:6901.

NVD Description

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

atm_tc_enqueue in net/sched/sch_atm.c in the Linux kernel through 6.1.4 allows attackers to cause a denial of service because of type confusion (non-negative numbers can sometimes indicate a TC_ACT_SHOT condition rather than valid classification results).

CVSS Scores

version 3.1