CVE-2023-53457

MEDIUM

Linux Kernel - Null Pointer Deref

Title source: llm

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.

References (8)

[Patch] https://git.kernel.org/stable/c/1b4c144767736221cad92c132f72b3c6ed06a0ea

[Patch] https://git.kernel.org/stable/c/2a3f20efe6c901d4c0871cfd1d8c65e2ade71fc1

[Patch] https://git.kernel.org/stable/c/3e5eb6c5ecd8ddb9cfea751cf30f9e23eac97ca3

[Patch] https://git.kernel.org/stable/c/3e94d0d378d2754b26fc54b429582553f7b53e15

[Patch] https://git.kernel.org/stable/c/47cfdc338d674d38f4b2f22b7612cc6a2763ba27

[Patch] https://git.kernel.org/stable/c/a7225e9e09519deb7e0c42eb6070029cc456e84d

[Patch] https://git.kernel.org/stable/c/a7d17d6bd7cd4f6940b335ea7a6fce5b6d22adc2

[Patch] https://git.kernel.org/stable/c/fd2db13fb72ff18c633a48229589d42ceb89d1f8

Scores

CVSS v3 5.5

EPSS 0.0001

EPSS Percentile 2.8%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Classification

CWE

CWE-476

Status published

Affected Products (6)

linux/linux_kernel < 4.14.324

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

Timeline

Published Oct 01, 2025

Tracked Since Feb 18, 2026