NULL Pointer Dereference Affecting kernel-64k-debug-modules package, versions <0:5.14.0-427.35.1.el9_4


Severity

Recommended
0.0
medium
0
10

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications

Snyk Learn

Learn about NULL Pointer Dereference vulnerabilities in an interactive lesson.

Start learning
  • Snyk IDSNYK-ALMALINUX9-KERNEL64KDEBUGMODULES-8339368
  • published4 Nov 2024
  • disclosed11 Sept 2024

Introduced: 11 Sep 2024

CVE-2024-41055  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 kernel-64k-debug-modules to version 0:5.14.0-427.35.1.el9_4 or higher.
This issue was patched in ALSA-2024:6567.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-64k-debug-modules package and not the kernel-64k-debug-modules package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

mm: prevent derefencing NULL ptr in pfn_section_valid()

Commit 5ec8e8ea8b77 ("mm/sparsemem: fix race in accessing memory_section->usage") changed pfn_section_valid() to add a READ_ONCE() call around "ms->usage" to fix a race with section_deactivate() where ms->usage can be cleared. The READ_ONCE() call, by itself, is not enough to prevent NULL pointer dereference. We need to check its value before dereferencing it.

CVSS Scores

version 3.1