CVE-2026-90200
kernel: fs/ntfs3: fix integer overflow in MFT cluster validation
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 17, 2026
Updated · October 13, 2026
Description
A flaw was found in the Linux kernel's NTFS3 file system driver. An integer overflow vulnerability exists in the Multi-File Table (MFT) cluster validation logic. When processing a specially crafted boot sector, the driver fails to properly validate MFT cluster numbers due to an integer overflow during multiplication. This can lead to the acceptance of malformed records, potentially causing file system mount failures and a denial of service.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-190 · Integer Overflow or Wraparound