# CVE-2024-43883: usb: vhci-hcd: Do not drop references before new references are gained

> A use-after-free vulnerability in the Linux kernel USB virtual host controller driver allows attackers to execute arbitrary code or escalate privileges.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 23 Aug 2024
- **Updated:** 5 Aug 2026
- **Also known as:** BELL-CVE-2024-43883, DEBIAN-CVE-2024-43883, GHSA-75gr-j667-pp37, UBUNTU-CVE-2024-43883

## What is CVE-2024-43883?

CVE-2024-43883 is a critical use after free vulnerability in Linux kernel, published on 23 Aug 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

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

usb: vhci-hcd: Do not drop references before new references are gained

At a few places the driver carries stale pointers
to references that can still be used. Make sure that does not happen.
This strictly speaking closes ZDI-CAN-22273, though there may be
similar races in the driver.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2024-43883?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2024-43883?

Apply the vendor's patch.

## Is CVE-2024-43883 being exploited?

There is no known exploitation of CVE-2024-43883 in the wild and no public exploit code.

## Other vulnerabilities in Linux kernel

- [CVE-2026-53266](https://insights.sbomify.com/CVE-2026-53266/): Linux Kernel Out-of-Bounds Write (high 8.8, exploited in the wild)
- [CVE-2013-6282](https://insights.sbomify.com/CVE-2013-6282/): Linux Kernel Improper Input Validation (high 8.8, exploited in the wild)
- [CVE-2022-0185](https://insights.sbomify.com/CVE-2022-0185/): Linux Kernel Heap-Based Buffer Overflow (high 8.4, exploited in the wild)
- [CVE-2013-2094](https://insights.sbomify.com/CVE-2013-2094/): Linux Kernel Privilege Escalation (high 8.4, exploited in the wild)
- [CVE-2026-53362](https://insights.sbomify.com/CVE-2026-53362/): Linux Kernel Unspecified (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-43883 and fix it if it is affected.

What it is: CVE-2024-43883 is a critical use after free vulnerability in Linux kernel, published on 23 Aug 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-43883 in the wild and no public exploit code.

Affected product: Linux kernel. 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-2024-43883/ (Markdown: https://insights.sbomify.com/CVE-2024-43883/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-43883
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-43883
- OSV: https://osv.dev/vulnerability/CVE-2024-43883

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-43883/
Summaries are generated and may contain mistakes; the official description above is the record.