BaseFortify

Publication date: 2025-10-04

Last updated on: 2026-03-21

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: ext2: Check block size validity during mount Check that log of block size stored in the superblock has sensible value. Otherwise the shift computing the block size can overflow leading to undefined behavior.

CVSS Scores

EPSS Scores

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Meta Information

Published

2025-10-04

Last Modified

2026-03-21

Generated

2026-07-06

AI Q&A

2025-10-04

EPSS Evaluated

2026-07-05

NVD

CVE-2023-53569

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	From 4.20 (inc) to 5.4.244 (exc)
linux	linux_kernel	From 4.15 (inc) to 4.19.284 (exc)
linux	linux_kernel	From 6.2 (inc) to 6.3.4 (exc)
linux	linux_kernel	From 5.16 (inc) to 6.1.30 (exc)
linux	linux_kernel	From 5.11 (inc) to 5.15.113 (exc)
linux	linux_kernel	From 5.5 (inc) to 5.10.181 (exc)
linux	linux_kernel	From 2.6.12.1 (inc) to 4.14.316 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability in the Linux kernel's ext2 filesystem involves improper validation of the block size during the mounting process. Specifically, the log of the block size stored in the superblock is not properly checked for sensible values. If this value is invalid, the calculation (shift) used to determine the block size can overflow, which may lead to undefined behavior in the system.

Impact Analysis

If exploited, this vulnerability could cause undefined behavior in the Linux kernel when mounting ext2 filesystems. This might lead to system instability, crashes, or potential security risks depending on how the undefined behavior manifests, possibly affecting system reliability and data integrity.

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