Integer Overflow or Wraparound Affecting kernel-64k-debug-modules-core package, versions <0:5.14.0-284.82.1.el9_2


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-RHEL9-KERNEL64KDEBUGMODULESCORE-7889158
  • published4 Sept 2024
  • disclosed30 Jul 2024

Introduced: 30 Jul 2024

CVE-2024-42131  (opens in a new tab)
CWE-190  (opens in a new tab)

How to fix?

Upgrade RHEL:9 kernel-64k-debug-modules-core to version 0:5.14.0-284.82.1.el9_2 or higher.
This issue was patched in RHSA-2024:6267.

NVD Description

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

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

mm: avoid overflows in dirty throttling logic

The dirty throttling logic is interspersed with assumptions that dirty limits in PAGE_SIZE units fit into 32-bit (so that various multiplications fit into 64-bits). If limits end up being larger, we will hit overflows, possible divisions by 0 etc. Fix these problems by never allowing so large dirty limits as they have dubious practical value anyway. For dirty_bytes / dirty_background_bytes interfaces we can just refuse to set so large limits. For dirty_ratio / dirty_background_ratio it isn't so simple as the dirty limit is computed from the amount of available memory which can change due to memory hotplug etc. So when converting dirty limits from ratios to numbers of pages, we just don't allow the result to exceed UINT_MAX.

This is root-only triggerable problem which occurs when the operator sets dirty limits to >16 TB.

CVSS Scores

version 3.1