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.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00036.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux Subscribe
Linux Kernel Subscribe

No data.

No data.

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Vendors Products
Linux Subscribe
Linux Kernel Subscribe
Advisories
Source ID Title
EUVD EUVD EUVD-2025-31870
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/3d20e3b768aff32112bdce8d3219d923ae75f9f1 cve-icon cve-icon
https://git.kernel.org/stable/c/53cafe1d6d8ef9f93318e5bfccc0d24f27d41ced cve-icon cve-icon
https://git.kernel.org/stable/c/5d029799d381a9ee06209a222cae75f04c5d5304 cve-icon cve-icon
https://git.kernel.org/stable/c/7a965da79f2d22601f329cbfce588386b0847544 cve-icon cve-icon
https://git.kernel.org/stable/c/965982feb333aefa9256c0fe188b5f1b958aef63 cve-icon cve-icon
https://git.kernel.org/stable/c/9a8d602f0723586e668bae7e65c832ceb9bcc8bc cve-icon cve-icon
https://git.kernel.org/stable/c/adac9ac6d2e04ea0782b91a00ba10706002f3ec4 cve-icon cve-icon
https://git.kernel.org/stable/c/d52252a1de4cf96a34f722b0cd8902d8ff78eb57 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025100128-CVE-2023-53506-2778@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2023-53506 cve-icon
https://www.cve.org/CVERecord?id=CVE-2023-53506 cve-icon
History

Thu, 02 Oct 2025 09:00:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Vendors & Products Linux
Linux linux Kernel

Thu, 02 Oct 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Moderate

Wed, 01 Oct 2025 12:00:00 +0000

Type Values Removed Values Added
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.
Title udf: Do not bother merging very long extents
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-10-01T11:45:56.616Z

Reserved: 2025-10-01T11:39:39.405Z

Link: CVE-2023-53506

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-10-01T12:15:54.320

Modified: 2025-10-02T19:11:46.753

Link: CVE-2023-53506

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-10-01T00:00:00Z

Links: CVE-2023-53506 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-10-02T08:38:39Z

Weaknesses

No weakness.