Out-of-Bounds Affecting kernel-rt-core package, versions <0:4.18.0-305.103.1.rt7.178.el8_4


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.05% (19th percentile)

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  • Snyk IDSNYK-RHEL8-KERNELRTCORE-5883371
  • published21 Apr 2023
  • disclosed20 Apr 2023

Introduced: 20 Apr 2023

CVE-2023-1829  (opens in a new tab)
CWE-119  (opens in a new tab)
First added by Snyk

How to fix?

Upgrade RHEL:8 kernel-rt-core to version 0:4.18.0-305.103.1.rt7.178.el8_4 or higher.
This issue was patched in RHSA-2023:4961.

NVD Description

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

A use-after-free vulnerability in the Linux Kernel traffic control index filter (tcindex) can be exploited to achieve local privilege escalation. The tcindex_delete function which does not properly deactivate filters in case of a perfect hashes while deleting the underlying structure which can later lead to double freeing the structure. A local attacker user can use this vulnerability to elevate its privileges to root. We recommend upgrading past commit 8c710f75256bb3cf05ac7b1672c82b92c43f3d28.

CVSS Scores

version 3.1