# CVE-2023-54100: scsi: qedi: Fix use after free bug in qedi_remove()

> A use-after-free vulnerability in the Linux kernel qedi driver allows attackers to cause a denial of service or potentially execute code during driver removal.

- **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:** 24 Dec 2025
- **Updated:** 5 Aug 2026
- **Also known as:** BELL-CVE-2023-54100, DEBIAN-CVE-2023-54100, GHSA-vqg2-rjjw-jc84, UBUNTU-CVE-2023-54100

## What is CVE-2023-54100?

CVE-2023-54100 is a high-severity use after free vulnerability in Linux, published on 24 Dec 2025. 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:

scsi: qedi: Fix use after free bug in qedi_remove()

In qedi_probe() we call __qedi_probe() which initializes
&qedi->recovery_work with qedi_recovery_handler() and
&qedi->board_disable_work with qedi_board_disable_work().

When qedi_schedule_recovery_handler() is called, schedule_delayed_work()
will finally start the work.

In qedi_remove(), which is called to remove the driver, the following
sequence may be observed:

Fix this by finishing the work before cleanup in qedi_remove().

CPU0                  CPU1

                     |qedi_recovery_handler
qedi_remove          |
  __qedi_remove      |
iscsi_host_free      |
scsi_host_put        |
//free shost         |
                     |iscsi_host_for_each_session
                     |//use qedi->shost

Cancel recovery_work and board_disable_work in __qedi_remove().

## Which versions are affected by CVE-2023-54100?


## How do I fix CVE-2023-54100?

Apply the vendor's patch.

## Is CVE-2023-54100 being exploited?

There is no known exploitation of CVE-2023-54100 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-54100 and fix it if it is affected.

What it is: CVE-2023-54100 is a high-severity use after free vulnerability in Linux, published on 24 Dec 2025. 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-2023-54100 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-2023-54100/ (Markdown: https://insights.sbomify.com/CVE-2023-54100/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-54100
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-54100
- OSV: https://osv.dev/vulnerability/CVE-2023-54100

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-54100/
Summaries are generated and may contain mistakes; the official description above is the record.