CVE-2026-72172

In the Linux kernel, the following vulnerability has been resolved: mm/mm_init: fix uninitialized struct pages for ZONE_DEVICE If DAX memory is hotplugged into an unoccupied subsection of an early section, section_activate() reuses the unoptimized boot memmap. However, compound_nr_pages() still assumes that vmemmap optimization is in effect and initializes only the reduced number of struct pages. As a result, the remaining tail struct pages are left uninitialized, which can later lead to unexpected behavior or crashes. Fix this by treating early sections as unoptimized when calculating how many struct pages to initialize.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/11f2826e9ee6f24aaa774e3dcd75abbe4b3091b6
https://git.kernel.org/stable/c/511a60e71aec308b24722cffc1912bf6befb87bf
https://git.kernel.org/stable/c/b91e27bce37cab9f35de0059278ebe457ca9878b
https://git.kernel.org/stable/c/c5ef574d57e4a701485c13f26822328c91f05413
https://git.kernel.org/stable/c/cd681403a87085562499d60325b7b45d3be11217
https://git.kernel.org/stable/c/da5234df0941665f3a3f5b80f3dab94046537be0

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-15 06:21

Updated : 2026-08-23 13:16

NVD link : CVE-2026-72172

Mitre link : CVE-2026-72172

CVE.ORG link : CVE-2026-72172

JSON object : View

Products Affected

No product.

CWE

No CWE.

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