CVE-2023-53569
Unknown Unknown - Not Provided
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.
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Meta Information
Published
2025-10-04
Last Modified
2026-03-21
Generated
2026-06-16
AI Q&A
2025-10-04
EPSS Evaluated
2026-06-15
NVD
CVE-2023-53569
Affected Vendors & Products
Showing 12 associated CPEs
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)
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Exploitability
CWE
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KEV
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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 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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