CVE-2026-31447

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.

CVSS 3.1

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

EPSS

0.1% chance of exploitation in the next 30 days; higher than 3% of CVEs (scores of 2026-10-25)

CWE

CWE-20

Published

2026-04-22

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

Affected

• linux:linux_kernel

References

• https://git.kernel.org/stable/c/3822743dc20386d9897e999dbb990befa3a5b3f8
• https://git.kernel.org/stable/c/3a926957cc95899ef88529710836edadc03c71a1
• https://git.kernel.org/stable/c/5ad6d994255e27a3254079dfb50ca861fc31f2d0
• https://git.kernel.org/stable/c/7b58c110b4e1f028eb38eec9ed3555e9be81c8b0
• https://git.kernel.org/stable/c/7d5b04290156c3fc316eecc86a4f9d201ab7d44a

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