CVE-2026-31447

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

22/04/2026

Last modified:

07/05/2026

Description

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.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

7.80

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	3.2 (including)	5.10.253 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.15.203 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	6.1.168 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.131 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.12.80 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.13 (including)	6.18.21 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.19 (including)	6.19.11 (excluding)
cpe:2.3:o:linux:linux_kernel:7.0:rc1::::::
cpe:2.3:o:linux:linux_kernel:7.0:rc2::::::
cpe:2.3:o:linux:linux_kernel:7.0:rc3::::::
cpe:2.3:o:linux:linux_kernel:7.0:rc4::::::
cpe:2.3:o:linux:linux_kernel:7.0:rc5::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2026-31447

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools