CVE-2026-31447 HIGH

CVE-2026-31447: ext4: reject mount if bigalloc with s_first_data_block != 0

Vendor Linux
Product Linux
Published April 22, 2026
Last update May 11, 2026
View on NVD All CVEs

CVSS base score

7.8/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

In the Linux kernel, the following vulnerability has been resolved: ext4: reject mount if bigalloc with s_first_data_block != 0 bigalloc with s_first_data_block != 0 is not supported, reject mounting it.

Key dates

02Disclosure timeline

April 22, 2026 CVE published
May 11, 2026 Record updated