CVE-2023-53506

udf: Do not bother merging very long extents

State: Published
Severity: 7.8 High
Published: Oct 1, 2025
Updated: Oct 15, 2026
Reserved: Oct 1, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before d52252a1de4cf96a34f722b0cd8902d8ff78eb57Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 5d029799d381a9ee06209a222cae75f04c5d5304Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 3d20e3b768aff32112bdce8d3219d923ae75f9f1Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 965982feb333aefa9256c0fe188b5f1b958aef63Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 9a8d602f0723586e668bae7e65c832ceb9bcc8bcAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before adac9ac6d2e04ea0782b91a00ba10706002f3ec4Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 7a965da79f2d22601f329cbfce588386b0847544Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 53cafe1d6d8ef9f93318e5bfccc0d24f27d41cedAffected
LinuxLinux	2.6.12Affected before 2.6.12Not affected 4.14.308 through 4.14.Not affected 4.19.276 through 4.19.Not affected 5.4.235 through 5.4.Not affected 5.10.173 through 5.10.Not affected 5.15.99 through 5.15.Not affected 6.1.16 through 6.1.Not affected 6.2.3 through 6.2.*Not affected 6.3 and laterNot affected

Product

Versions

LinuxLinux

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before d52252a1de4cf96a34f722b0cd8902d8ff78eb57Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 5d029799d381a9ee06209a222cae75f04c5d5304Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 3d20e3b768aff32112bdce8d3219d923ae75f9f1Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 965982feb333aefa9256c0fe188b5f1b958aef63Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 9a8d602f0723586e668bae7e65c832ceb9bcc8bcAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before adac9ac6d2e04ea0782b91a00ba10706002f3ec4Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 7a965da79f2d22601f329cbfce588386b0847544Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 53cafe1d6d8ef9f93318e5bfccc0d24f27d41cedAffected

LinuxLinux

2.6.12Affected
before 2.6.12Not affected
4.14.308 through 4.14.*Not affected
4.19.276 through 4.19.*Not affected
5.4.235 through 5.4.*Not affected
5.10.173 through 5.10.*Not affected
5.15.99 through 5.15.*Not affected
6.1.16 through 6.1.*Not affected
6.2.3 through 6.2.*Not affected
6.3 and laterNot affected

References

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