CVE-2023-53457
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-01

Last updated on: 2025-10-02

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: FS: JFS: Fix null-ptr-deref Read in txBegin Syzkaller reported an issue where txBegin may be called on a superblock in a read-only mounted filesystem which leads to NULL pointer deref. This could be solved by checking if the filesystem is read-only before calling txBegin, and returning with appropiate error code.
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Meta Information
Published
2025-10-01
Last Modified
2025-10-02
Generated
2026-06-16
AI Q&A
2025-10-01
EPSS Evaluated
2026-06-14
NVD
CVE-2023-53457
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability occurs in the Linux kernel's JFS filesystem where a function called txBegin may be called on a superblock that is mounted as read-only. This leads to a NULL pointer dereference, which is a type of error where the system tries to access memory through a pointer that is null, causing a crash or unexpected behavior. The issue was fixed by adding a check to ensure the filesystem is not read-only before calling txBegin, returning an appropriate error code if it is.

Impact Analysis

This vulnerability can cause the Linux kernel to crash or behave unexpectedly when accessing a read-only JFS filesystem, potentially leading to denial of service or system instability.

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