CVE-2024-42131

CVE Details

Release Date:

2024-07-30

Description

In the Linux kernel, the following vulnerability has been resolved:\nmm: avoid overflows in dirty throttling logic\nThe dirty throttling logic is interspersed with assumptions that dirty\nlimits in PAGE_SIZE units fit into 32-bit (so that various multiplications\nfit into 64-bits). If limits end up being larger, we will hit overflows,\npossible divisions by 0 etc. Fix these problems by never allowing so\nlarge dirty limits as they have dubious practical value anyway. For\ndirty_bytes / dirty_background_bytes interfaces we can just refuse to set\nso large limits. For dirty_ratio / dirty_background_ratio it isn't so\nsimple as the dirty limit is computed from the amount of available memory\nwhich can change due to memory hotplug etc. So when converting dirty\nlimits from ratios to numbers of pages, we just don't allow the result to\nexceed UINT_MAX.\nThis is root-only triggerable problem which occurs when the operator\nsets dirty limits to >16 TB.

See more information about CVE-2024-42131 from MITRE CVE dictionary and NIST NVD

CVSS Scoring

NOTE: The following CVSS v3.1 metrics and score provided are preliminary and subject to review.

Base Score:	4.4	CVSS Vector:	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack Vector:	Local network	Attack Complexity:	Low
Privileges Required:	High	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	None	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (kernel-uek)	ELSA-2024-12780	2024-10-11
Oracle Linux version 7 (kernel-uek)	ELSA-2024-12782	2024-10-14
Oracle Linux version 8 (kernel)	ELSA-2024-7000	2024-09-24
Oracle Linux version 8 (kernel-uek)	ELSA-2024-12618	2024-09-12
Oracle Linux version 8 (kernel-uek)	ELSA-2024-12780	2024-10-11
Oracle Linux version 8 (kernel-uek)	ELSA-2024-12782	2024-10-14
Oracle Linux version 9 (kernel)	ELSA-2024-6567	2024-09-11
Oracle Linux version 9 (kernel-uek)	ELSA-2024-12618	2024-09-12