CVE-2024-40948

CVE Details

Release Date:

2024-07-12

Description

In the Linux kernel, the following vulnerability has been resolved:\nmm/page_table_check: fix crash on ZONE_DEVICE\nNot all pages may apply to pgtable check. One example is ZONE_DEVICE\npages: they map PFNs directly, and they don't allocate page_ext at all\neven if there's struct page around. One may reference\ndevm_memremap_pages().\nWhen both ZONE_DEVICE and page-table-check enabled, then try to map some\ndax memories, one can trigger kernel bug constantly now when the kernel\nwas trying to inject some pfn maps on the dax device:\nkernel BUG at mm/page_table_check.c:55!\nWhile it's pretty legal to use set_pxx_at() for ZONE_DEVICE pages for page\nfault resolutions, skip all the checks if page_ext doesn't even exist in\npgtable checker, which applies to ZONE_DEVICE but maybe more.

See more information about CVE-2024-40948 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:	5.5	CVSS Vector:	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector:	Local network	Attack Complexity:	Low
Privileges Required:	Low	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	None	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 9 (kernel)	ELSA-2024-9315	2024-11-14