Linux Kernel up to 6.4.6 null pointer dereference

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.4.6. This affects an unknown part. The manipulation results in null pointer dereference. This vulnerability is reported as CVE-2023-53457. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.4.6. Affected is an unknown function. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. CVE summarizes:

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.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2023-53457 since 09/17/2025. There are neither technical details nor an exploit publicly available.

Upgrading to version 4.14.324, 4.19.293, 5.4.255, 5.10.192, 5.15.123, 6.1.42 or 6.4.7 eliminates this vulnerability. Applying the patch a7225e9e09519deb7e0c42eb6070029cc456e84d/1b4c144767736221cad92c132f72b3c6ed06a0ea/a7d17d6bd7cd4f6940b335ea7a6fce5b6d22adc2/2a3f20efe6c901d4c0871cfd1d8c65e2ade71fc1/3e94d0d378d2754b26fc54b429582553f7b53e15/3e5eb6c5ecd8ddb9cfea751cf30f9e23eac97ca3/fd2db13fb72ff18c633a48229589d42ceb89d1f8/47cfdc338d674d38f4b2f22b7612cc6a2763ba27 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at EUVD (EUVD-2025-32811) and CERT Bund (WID-SEC-2025-2187). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

• Amazon Linux 2
• Red Hat Enterprise Linux
• SUSE Linux
• Oracle Linux
• Open Source Linux Kernel
• Dell Secure Connect Gateway

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.14.323
• 4.19.292
• 5.4.254
• 5.10.191
• 5.15.122
• 6.1.0
• 6.1.1
• 6.1.2
• 6.1.3
• 6.1.4
• 6.1.5
• 6.1.6
• 6.1.7
• 6.1.8
• 6.1.9
• 6.1.10
• 6.1.11
• 6.1.12
• 6.1.13
• 6.1.14
• 6.1.15
• 6.1.16
• 6.1.17
• 6.1.18
• 6.1.19
• 6.1.20
• 6.1.21
• 6.1.22
• 6.1.23
• 6.1.24
• 6.1.25
• 6.1.26
• 6.1.27
• 6.1.28
• 6.1.29
• 6.1.30
• 6.1.31
• 6.1.32
• 6.1.33
• 6.1.34
• 6.1.35
• 6.1.36
• 6.1.37
• 6.1.38
• 6.1.39
• 6.1.40
• 6.1.41
• 6.4.0
• 6.4.1
• 6.4.2
• 6.4.3
• 6.4.4
• 6.4.5
• 6.4.6

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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