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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2025-10-01

Last Modified

2025-10-02

Generated

2026-07-06

AI Q&A

2025-10-01

EPSS Evaluated

2026-07-05

NVD

CVE-2023-53457

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	From 5.15.160 (inc) to 5.16 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

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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