CVE-2026-72198

Technical Description

In the Linux kernel, the following vulnerability has been resolved:

ntfs: reject non-resident records for resident-only attributes

The shared lookup-time attribute validator rejects non-resident

$FILE_NAME and $VOLUME_NAME records because their formats require

resident values and callers handle returned records as resident

attributes. Other resident-only attribute types still pass through the

generic non-resident mapping-pairs checks.

That leaves real resident/non-resident union confusion paths. Inode load

looks up $STANDARD_INFORMATION and then reads data.resident.value_offset

without checking a->non_resident. ntfs_inode_sync_standard_information()

does the same when updating the standard information value.

ntfs_write_volume_flags() also looks up $VOLUME_INFORMATION and reads

data.resident.value_offset directly. $INDEX_ROOT callers in dir.c and

index.c depend on the same lookup contract before consuming the resident

index root value.

Reject non-resident records for all resident-on

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References