CVE-2023-53506: linux kernel — Fix

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.

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CVSS v3.1 Score

7.8

HIGH

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

Affected Products

Vendor	Product	Versions
linux	linux_kernel	2.6.12.1 — 4.14.308
linux	linux_kernel	4.15 — 4.19.276
linux	linux_kernel	4.20 — 5.4.235
linux	linux_kernel	5.5 — 5.10.173
linux	linux_kernel	5.11 — 5.15.99
linux	linux_kernel	5.16 — 6.1.16
linux	linux_kernel	6.2 — 6.2.3
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2023-53506? +

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. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-53506? +

CVE-2023-53506 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2023-53506? +

CVE-2023-53506 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-53506? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2023-53506