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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2023-53222 Detail

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


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/11509910c599cbd04585ec35a6d5e1a0053d84c1 kernel.org
https://git.kernel.org/stable/c/2a03c4e683d33d17b667418eb717b13dda1fac6b kernel.org
https://git.kernel.org/stable/c/47b7eaae08e8b2f25bdf37bc14d21be090bcb20f kernel.org
https://git.kernel.org/stable/c/8c1efe3f74a7864461b0dff281c5562154b4aa8e kernel.org
https://git.kernel.org/stable/c/a4855aeb13e4ad1f23e16753b68212e180f7d848 kernel.org
https://git.kernel.org/stable/c/c7feb54b113802d2aba98708769d3c33fb017254 kernel.org
https://git.kernel.org/stable/c/de984faecddb900fa850af4df574a25b32bb93f5 kernel.org
https://git.kernel.org/stable/c/ef5c205b6e6f8d1f18ef0b4a9832b1b5fa85f7f2 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2023-53222
NVD Published Date:
09/15/2025
NVD Last Modified:
09/15/2025
Source:
kernel.org