# CVE-2026-68153: libceph: remove debugfs files before client teardown

> A use-after-free in the Linux kernel's Ceph client allows attackers to cause denial of service or execute code via concurrent debugfs access.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 10 Aug 2026
- **Updated:** 19 Oct 2026
- **Also known as:** BELL-CVE-2026-68153, DEBIAN-CVE-2026-68153, GHSA-3j44-h3h4-hxhf, UBUNTU-CVE-2026-68153

## What is CVE-2026-68153?

CVE-2026-68153 is a high-severity use after free vulnerability in Linux, published on 10 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

In the Linux kernel, the following vulnerability has been resolved:

libceph: remove debugfs files before client teardown

ceph_destroy_client() tears down the monitor client before removing
the per-client debugfs files. A concurrent read of the monmap debugfs
file can enter monmap_show() after ceph_monc_stop() has freed
monc->monmap, triggering a use-after-free.

Remove the debugfs files before stopping the OSD and monitor clients.
debugfs_remove() drains active handlers and prevents new accesses, so
the debugfs callbacks can no longer race the rest of client teardown.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2026-68153?


## How do I fix CVE-2026-68153?

Apply the vendor's patch.

## Is CVE-2026-68153 being exploited?

There is no known exploitation of CVE-2026-68153 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-68153 and fix it if it is affected.

What it is: CVE-2026-68153 is a high-severity use after free vulnerability in Linux, published on 10 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-68153 in the wild and no public exploit code.

Affected product: Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-68153/ (Markdown: https://insights.sbomify.com/CVE-2026-68153/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-68153
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-68153
- OSV: https://osv.dev/vulnerability/CVE-2026-68153

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-68153/
Summaries are generated and may contain mistakes; the official description above is the record.