# CVE-2025-37792: Bluetooth: btrtl: Prevent potential NULL dereference

> A NULL pointer dereference in the Linux kernel Bluetooth driver can cause a system crash when loading a zero-length firmware file.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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:** 1 May 2025
- **Updated:** 11 May 2026
- **Also known as:** BELL-CVE-2025-37792, DEBIAN-CVE-2025-37792, GHSA-xgcc-8xxp-phhm, ROOT-OS-DEBIAN-12-CVE-2025-37792, ROOT-OS-UBUNTU-2204-CVE-2025-37792, ROOT-OS-UBUNTU-2404-CVE-2025-37792, UBUNTU-CVE-2025-37792

## What is CVE-2025-37792?

CVE-2025-37792 is a medium-severity vulnerability in Debian Debian Linux, published on 1 May 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:

Bluetooth: btrtl: Prevent potential NULL dereference

The btrtl_initialize() function checks that rtl_load_file() either
had an error or it loaded a zero length file.  However, if it loaded
a zero length file then the error code is not set correctly.  It
results in an error pointer vs NULL bug, followed by a NULL pointer
dereference.  This was detected by Smatch:

drivers/bluetooth/btrtl.c:592 btrtl_initialize() warn: passing zero to 'ERR_PTR'

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2025-37792?

It affects 2 products.


Products: Debian Debian Linux, Linux kernel.

## How do I fix CVE-2025-37792?

Apply the vendor's patch.

## Is CVE-2025-37792 being exploited?

There is no known exploitation of CVE-2025-37792 in the wild and no public exploit code.

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## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-37792 and fix it if it is affected.

What it is: CVE-2025-37792 is a medium-severity vulnerability in Debian Debian Linux, published on 1 May 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-2025-37792 in the wild and no public exploit code.

Affected product: Debian Debian 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-2025-37792/ (Markdown: https://insights.sbomify.com/CVE-2025-37792/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-37792
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-37792
- OSV: https://osv.dev/vulnerability/CVE-2025-37792

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-37792/
Summaries are generated and may contain mistakes; the official description above is the record.