SB20260816354 - Improper Initialization in Linux kernel mm

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Main Vulnerability Database SB20260816354

SB20260816354 - Improper Initialization in Linux kernel mm

Published: August 16, 2026

Security Bulletin ID SB20260816354
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper Initialization (CVE-ID: CVE-2026-72172)

CWE-ID: CWE-665 - Improper Initialization

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local attacker to cause a denial of service.

The vulnerability exists due to uninitialized memory in struct pages for ZONE_DEVICE in mm/mm_init.c when hot-plugging DAX memory into an unoccupied subsection of an early section. A local attacker can hot-plug crafted DAX memory to cause a denial of service.

The issue occurs because the unoptimized boot memmap is reused for early sections while only a reduced number of struct pages are initialized, leaving remaining tail struct pages uninitialized.


Remediation

Install update from vendor's website.

References