High 7.8Published Oct 1, 2025

CVE-2023-53506udf: Do not bother merging very long extents

Updated under an hour ago (Oct 27, 2026, 5:50 AM ET)

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Exploited in the last 30 days

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: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 15, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d52252a1de4cf96a34f722b0cd8902d8ff78eb57; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 5d029799d381a9ee06209a222cae75f04c5d5304; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 3d20e3b768aff32112bdce8d3219d923ae75f9f1; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 965982feb333aefa9256c0fe188b5f1b958aef63; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 9a8d602f0723586e668bae7e65c832ceb9bcc8bc; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before adac9ac6d2e04ea0782b91a00ba10706002f3ec4; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 7a965da79f2d22601f329cbfce588386b0847544; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 53cafe1d6d8ef9f93318e5bfccc0d24f27d41ced	CNA record
linux linux_kernel linux:linux_kernel	from 2.6.12.1 before 4.14.308; from 4.15 before 4.19.276; from 4.20 before 5.4.235; from 5.5 before 5.10.173; from 5.11 before 5.15.99; from 5.16 before 6.1.16; from 6.2 before 6.2.3; 2.6.12; and 4 more ranges	NVD

References

References

https://git.kernel.org/stable/c/d52252a1de4cf96a34f722b0cd8902d8ff78eb57	patch
https://git.kernel.org/stable/c/5d029799d381a9ee06209a222cae75f04c5d5304	patch
https://git.kernel.org/stable/c/3d20e3b768aff32112bdce8d3219d923ae75f9f1	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/7a965da79f2d22601f329cbfce588386b0847544	patch
https://git.kernel.org/stable/c/53cafe1d6d8ef9f93318e5bfccc0d24f27d41ced	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.