Bug 2516400 (CVE-2026-72207)

Summary: CVE-2026-72207 kernel: ntfs: not change 0-byte $DATA attribute to non-resident
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in the NTFS file system driver in the Linux kernel. When the ntfs_resident_attr_resize() function attempts to free space by converting resident attributes to non-resident, it incorrectly selects zero-length $DATA attributes for this conversion. This can lead to fsck (file system check) treating these 0-byte non-resident $DATA attributes as corruptions, potentially resulting in file system integrity issues.
 Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-08-15 06:10:29 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ntfs: not change 0-byte $DATA attribute to non-resident

When ntfs_resident_attr_resize() cannot grow a resident attribute in
place, it retries after converting other resident attributes to
non-resident to free space in the MFT recrord.

Do not select zero-length resident $DATA attributes for this conversion.
fsck treats 0-byte non-resident $DATA attribute as corruptions.
Comment 1 Keith Grant 2026-08-18 15:26:23 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081544-CVE-2026-72207-169c@gregkh/T