CVE-2026-31447

HighCVSS 7.8/10Last modified Nov 11, 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.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-20

Affected software

VendorProductVersions
LinuxLinux>= 281b59959707dfae03ce038cdf231bf4904e170c, < 5ad6d994255e27a3254079dfb50ca861fc31f2d0; >= 281b59959707dfae03ce038cdf231bf4904e170c, < 3a926957cc95899ef88529710836edadc03c71a1; >= 281b59959707dfae03ce038cdf231bf4904e170c, < 7b58c110b4e1f028eb38eec9ed3555e9be81c8b0; >= 281b59959707dfae03ce038cdf231bf4904e170c, < b77de3fceafbb39f30e4ff5dc986f863d5456417; >= 281b59959707dfae03ce038cdf231bf4904e170c, < d787d3ae96648dc14a3b7ca8fde817177e82c1c7; >= 281b59959707dfae03ce038cdf231bf4904e170c, < ad1f6d608f33f59d21a3d025615d6786a6443998; >= 281b59959707dfae03ce038cdf231bf4904e170c, < 7d5b04290156c3fc316eecc86a4f9d201ab7d44a; >= 281b59959707dfae03ce038cdf231bf4904e170c, < 3822743dc20386d9897e999dbb990befa3a5b3f8
LinuxLinux3.2
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.6, < *
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.5, < *
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.7, < *
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.6, < *
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.5, < *
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.7, < *
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP>= V3.1.6, < *
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP>= V3.1.5, < *
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP>= V3.1.7, < *
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP>= V3.1.6, < *
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP>= V3.1.5, < *
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP>= V3.1.7, < *
SiemensSIPLUS S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.6, < *
SiemensSIPLUS S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.5, < *
SiemensSIPLUS S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.7, < *

References

Timeline

Published
Apr 22, 2026
Last modified
Nov 11, 2026
NVD status
Modified

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CVE-2026-31447: High severity, CVSS 7.8 | Vulnix