# CVE-2026-31447

> Vulnerability · severity: **HIGH** (CVSS 7.8).

## 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.

## Key facts

- **CVE ID:** CVE-2026-31447
- **Published:** 2026-04-22
- **CVSS severity:** HIGH
- **CVSS base score:** 7.8
- **CWE codes:** NVD-CWE-noinfo

## Affected products

- `linux:linux_kernel`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-31447

## Citation

> AI Analytics. CVE-2026-31447. Retrieved 2026-07-20 from https://api.ai-analytics.org/cve/CVE-2026-31447. Derived from NIST NVD. Licensed CC0.

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