SB20260816328 - Out-of-bounds write in Linux kernel ntfs3

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Main Vulnerability Database SB20260816328

SB20260816328 - Out-of-bounds write in Linux kernel ntfs3

Published: August 16, 2026

Security Bulletin ID SB20260816328
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Physical 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) Out-of-bounds write (CVE-ID: CVE-2026-72197)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 5.1 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows an attacker with physical access to cause a denial of service.

The vulnerability exists due to an out-of-bounds write in do_action() in fs/ntfs3/fslog.c when processing a crafted NTFS image during mount. An attacker with physical access can provide a specially crafted NTFS image to cause a denial of service.

The issue is triggered in the DeleteIndexEntryAllocation case when an on-disk INDEX_BUFFER entry contains a malformed size value, causing memmove() to use an invalid length. User interaction is required to mount the crafted filesystem image.


Remediation

Install update from vendor's website.

References