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CVE-2023-53222

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: jfs: jfs_dmap: Validate db_l2nbperpage while mounting In jfs_dmap.c at line 381, BLKTODMAP is used to get a logical block numbe…

Published Sep 15, 2025CWE-125EPSS 0.17%

Overview

CVE-2023-53222 is a high-severity vulnerability. It was published on September 15, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

jfs: jfs_dmap: Validate db_l2nbperpage while mounting

In jfs_dmap.c at line 381, BLKTODMAP is used to get a logical block

number inside dbFree(). db_l2nbperpage, which is the log2 number of

blocks per page, is passed as an argument to BLKTODMAP which uses it

for shifting.

Syzbot reported a shift out-of-bounds crash because db_l2nbperpage is

too big. This happens because the large value is set without any

validation in dbMount() at line 181.

Thus, make sure that db_l2nbperpage is correct while mounting.

Max number of blocks per page = Page size / Min block size

=> log2(Max num_block per page) = log2(Page size / Min block size)

= log2(Page size) - log2(Min block size)

=> Max db_l2nbperpage = L2PSIZE - L2MINBLOCKSIZE

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/11509910c599cbd04585ec35a6d5e1a0053d84c1Refgit.kernel.org/stable/c/2a03c4e683d33d17b667418eb717b13dda1fac6bRefgit.kernel.org/stable/c/47b7eaae08e8b2f25bdf37bc14d21be090bcb20fRefgit.kernel.org/stable/c/8c1efe3f74a7864461b0dff281c5562154b4aa8eRefgit.kernel.org/stable/c/a4855aeb13e4ad1f23e16753b68212e180f7d848Refgit.kernel.org/stable/c/c7feb54b113802d2aba98708769d3c33fb017254Refgit.kernel.org/stable/c/de984faecddb900fa850af4df574a25b32bb93f5Refgit.kernel.org/stable/c/ef5c205b6e6f8d1f18ef0b4a9832b1b5fa85f7f2

How CyberStrike helps

Frequently asked questions

What is CVE-2023-53222?

CVE-2023-53222 is a high-severity vulnerability. It was published on September 15, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-53222?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-53222?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-53222?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-53222 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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