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Vulnerability record · CVE-2023-53506 · published 1 October 2025

CVE-2023-53506: Linux kernel vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: udf: Do not bother merging very long extents When merging very long extents we try to push as much length as possible to the first extent. However this is unnecessarily complicated and not really worth the trouble. Furthermore there was a bug in the logic resulting in corrupting extents in the file as syzbot reproducer shows. So just don't bother with the merging of extents that are too long together.

7.8 CVSS 3.1 High EPSS 0.16% · top 95.0%
7.8CVSS 3.1 base score
0.16%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
4 Aug 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: udf: Do not bother merging very long extents When merging very long extents we try to push as much length as possible to the first extent. However this is unnecessarily complicated and not really worth the trouble. Furthermore there was a bug in the logic resulting in corrupting extents in the file as syzbot reproducer shows. So just don't bother with the merging of extents that are too long together.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/3d20e3b768aff32112bdce8d3219d923ae75f9f1 Patch
https://git.kernel.org/stable/c/53cafe1d6d8ef9f93318e5bfccc0d24f27d41ced Patch
https://git.kernel.org/stable/c/5d029799d381a9ee06209a222cae75f04c5d5304 Patch
https://git.kernel.org/stable/c/7a965da79f2d22601f329cbfce588386b0847544 Patch
https://git.kernel.org/stable/c/965982feb333aefa9256c0fe188b5f1b958aef63 Patch
https://git.kernel.org/stable/c/9a8d602f0723586e668bae7e65c832ceb9bcc8bc Patch
https://git.kernel.org/stable/c/adac9ac6d2e04ea0782b91a00ba10706002f3ec4 Patch
https://git.kernel.org/stable/c/d52252a1de4cf96a34f722b0cd8902d8ff78eb57 Patch

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Source: NIST National Vulnerability Database (record CVE-2023-53506), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.