Resource Leak Affecting kernel-debug-modules package, versions <0:4.18.0-513.5.1.el8_9


Severity

Recommended
high

Based on CentOS security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-CENTOS8-KERNELDEBUGMODULES-6154917
  • published12 Jan 2024
  • disclosed14 Dec 2023

Introduced: 14 Dec 2023

CVE-2024-0443  (opens in a new tab)
CWE-402  (opens in a new tab)

How to fix?

Upgrade Centos:8 kernel-debug-modules to version 0:4.18.0-513.5.1.el8_9 or higher.

NVD Description

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

A flaw was found in the blkgs destruction path in block/blk-cgroup.c in the Linux kernel, leading to a cgroup blkio memory leakage problem. When a cgroup is being destroyed, cgroup_rstat_flush() is only called at css_release_work_fn(), which is called when the blkcg reference count reaches 0. This circular dependency will prevent blkcg and some blkgs from being freed after they are made offline. This issue may allow an attacker with a local access to cause system instability, such as an out of memory error.

CVSS Scores

version 3.1