CVE-2023-54305
Unknown Unknown - Not Provided

Null Pointer Dereference in Linux ext4 Causes Kernel Panic

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: ext4: refuse to create ea block when umounted The ea block expansion need to access s_root while it is already set as NULL when umount is triggered. Refuse this request to avoid panic.

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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-2023-54305
EUVD
EUVD-2023-60499

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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Mitigation Strategies

To mitigate this vulnerability, update your Linux kernel to a version where the ext4 ea block creation issue during unmount is fixed. Avoid using affected kernel versions and apply any available patches from your Linux distribution.

Executive Summary

This vulnerability occurs in the Linux kernel's ext4 filesystem where an attempt to create an extended attribute (ea) block is made during the unmount process. Specifically, the ea block expansion tries to access s_root, which is already set to NULL when unmounting is triggered. This can cause a system panic. The fix refuses the request to create the ea block during unmount to avoid this panic.

Impact Analysis

This vulnerability can cause the Linux system to panic during the unmounting of an ext4 filesystem, potentially leading to system instability or crashes. This could result in data loss or downtime if the system becomes unresponsive.

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