CVE-2024-53685

Summary

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.

Impact & exploitability

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

Affected products we track (1)

Recommendation

Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/0f2b2d9e881c90402dbe28f9ba831775b7992e1f ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/0f2b2d9e881c90402dbe28f9ba831775b7992e1fPatch
• https://git.kernel.org/stable/c/550f7ca98ee028a606aa75705a7e77b1bd11720fPatch
• https://git.kernel.org/stable/c/99a37ab76a315c8307eb5b0dc095d8ad9d8efeaaPatch
• https://git.kernel.org/stable/c/c47ed91156daf328601d02b58d52d9804da54108Patch
• https://git.kernel.org/stable/c/d42ad3f161a5a487f81915c406f46943c7187a0aPatch
• https://git.kernel.org/stable/c/e4b168c64da06954be5d520f6c16469b1cadc069Patch
• https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
• https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html