CVE-2023-53506
Published: October 2, 2025Last modified: October 2, 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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.8 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | HIGH |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Not affected (6.1.33-r0) |
| 25 LTS | linux-lts | Not affected (6.6.89-r0) | |
| Stream | linux-lts | Fixed (6.6.58-r0) |
References
- https://git.kernel.org/stable/c/3d20e3b768aff32112bdce8d3219d923ae75f9f1
- https://git.kernel.org/stable/c/53cafe1d6d8ef9f93318e5bfccc0d24f27d41ced
- https://git.kernel.org/stable/c/5d029799d381a9ee06209a222cae75f04c5d5304
- https://git.kernel.org/stable/c/7a965da79f2d22601f329cbfce588386b0847544
- https://git.kernel.org/stable/c/965982feb333aefa9256c0fe188b5f1b958aef63
- https://git.kernel.org/stable/c/9a8d602f0723586e668bae7e65c832ceb9bcc8bc
- https://git.kernel.org/stable/c/adac9ac6d2e04ea0782b91a00ba10706002f3ec4
- https://git.kernel.org/stable/c/d52252a1de4cf96a34f722b0cd8902d8ff78eb57