CVE-2022-50815
Unknown Unknown - Not Provided

Filesystem Size Validation Flaw in Linux ext2 Risks Mount Failures

Publication date: 2025-12-30

Last updated on: 2025-12-30

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ext2: Add sanity checks for group and filesystem size Add sanity check that filesystem size does not exceed the underlying device size and that group size is big enough so that metadata can fit into it. This avoid trying to mount some crafted filesystems with extremely large group counts.

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Meta Information

Published
2025-12-30
Last Modified
2025-12-30
Generated
2026-07-06
AI Q&A
2025-12-30
EPSS Evaluated
2026-07-05
NVD
CVE-2022-50815

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in the Linux kernel's ext2 filesystem involves missing sanity checks for the filesystem size and group size. Without these checks, it was possible to mount crafted filesystems with extremely large group counts that exceed the underlying device size or have group sizes too small to fit metadata. The fix adds checks to ensure the filesystem size does not exceed the device size and that group size is sufficient for metadata.

Impact Analysis

This vulnerability could allow an attacker to mount specially crafted ext2 filesystems that have invalid sizes or group counts, potentially leading to system instability, crashes, or denial of service due to improper handling of filesystem metadata.

Mitigation Strategies

To mitigate this vulnerability, update the Linux kernel to a version that includes the fix adding sanity checks for ext2 filesystem group and size. This prevents mounting crafted filesystems with extremely large group counts that could exploit the vulnerability.

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