CVE-2024-53685: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: ceph: give up on paths longer than PATH_MAX If the full path to be built by ceph_mdsc_build_path() happens to be longer than PATH_MAX, then this function will enter an endless (retry) loop, effectively blocking the whole task. Most of the machine becomes unusable, making this a very simple and effective DoS vulnerability. I cannot imagine why this retry was ever implemented, but it seems rather useless and harmful to me. Let's remove it and fail with ENAMETOOLONG instead.

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CVSS v3.1 Score

5.5

MEDIUM

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

Weakness Type (CWE)

CWE-835 CWE-835

Affected Products

Vendor	Product	Versions
linux	linux_kernel	2.6.35 — 5.10.234
linux	linux_kernel	5.11 — 5.15.177
linux	linux_kernel	5.16 — 6.1.125
linux	linux_kernel	6.2 — 6.6.70
linux	linux_kernel	6.7 — 6.12.7
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
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/0f2b2d9e881c90402dbe28f9ba831775b7992e1f https://git.kernel.org/stable/c/550f7ca98ee028a606aa75705a7e77b1bd11720f https://git.kernel.org/stable/c/99a37ab76a315c8307eb5b0dc095d8ad9d8efeaa https://git.kernel.org/stable/c/c47ed91156daf328601d02b58d52d9804da54108 https://git.kernel.org/stable/c/d42ad3f161a5a487f81915c406f46943c7187a0a https://git.kernel.org/stable/c/e4b168c64da06954be5d520f6c16469b1cadc069

Other References

https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

Frequently Asked Questions

What is CVE-2024-53685? +

In the Linux kernel, the following vulnerability has been resolved: ceph: give up on paths longer than PATH_MAX If the full path to be built by ceph_mdsc_build_path() happens to be longer than PATH_MAX, then this function will enter an endless (retry) loop, effectively blocking the whole task. Most of the machine becomes unusable, making this a very simple and effective DoS vulnerability. I cannot imagine why this retry was ever implemented, but it seems rather useless and harmful to me. Let's remove it and fail with ENAMETOOLONG instead. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-53685? +

CVE-2024-53685 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-53685? +

CVE-2024-53685 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-2024-53685? +

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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