CVE-2026-31447
ext4: reject mount if bigalloc with s_first_data_block != 0
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.
INFO
Published Date :
April 22, 2026, 2:16 p.m.
Last Modified :
April 22, 2026, 2:16 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Update the Linux kernel to a patched version.
- Reboot the system after the update.
- Verify the system is running the updated kernel.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-31447.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-31447 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-31447
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-31447 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-31447 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Apr. 22, 2026
Action Type Old Value New Value Added 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. Added Reference https://git.kernel.org/stable/c/3822743dc20386d9897e999dbb990befa3a5b3f8 Added Reference https://git.kernel.org/stable/c/3a926957cc95899ef88529710836edadc03c71a1 Added Reference https://git.kernel.org/stable/c/5ad6d994255e27a3254079dfb50ca861fc31f2d0 Added Reference https://git.kernel.org/stable/c/7b58c110b4e1f028eb38eec9ed3555e9be81c8b0 Added Reference https://git.kernel.org/stable/c/7d5b04290156c3fc316eecc86a4f9d201ab7d44a Added Reference https://git.kernel.org/stable/c/ad1f6d608f33f59d21a3d025615d6786a6443998 Added Reference https://git.kernel.org/stable/c/b77de3fceafbb39f30e4ff5dc986f863d5456417 Added Reference https://git.kernel.org/stable/c/d787d3ae96648dc14a3b7ca8fde817177e82c1c7