# CVE-2022-48873: misc: fastrpc: Don't remove map on creater_process and device_release

> A use-after-free vulnerability in the Linux kernel's fastrpc driver allows attackers to execute arbitrary code or escalate privileges.

- **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:** 21 Aug 2024
- **Updated:** 5 Aug 2026
- **Also known as:** DEBIAN-CVE-2022-48873, GHSA-j2cv-6c69-ccm5, UBUNTU-CVE-2022-48873

## What is CVE-2022-48873?

CVE-2022-48873 is a high-severity use after free vulnerability in Linux kernel, published on 21 Aug 2024. 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:

misc: fastrpc: Don't remove map on creater_process and device_release

Do not remove the map from the list on error path in
fastrpc_init_create_process, instead call fastrpc_map_put, to avoid
use-after-free. Do not remove it on fastrpc_device_release either,
call fastrpc_map_put instead.

The fastrpc_free_map is the only proper place to remove the map.
This is called only after the reference count is 0.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2022-48873?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2022-48873?

Apply the vendor's patch.

## Is CVE-2022-48873 being exploited?

There is no known exploitation of CVE-2022-48873 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-2022-48873 and fix it if it is affected.

What it is: CVE-2022-48873 is a high-severity use after free vulnerability in Linux kernel, published on 21 Aug 2024. 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-2022-48873 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-2022-48873/ (Markdown: https://insights.sbomify.com/CVE-2022-48873/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-48873
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-48873
- OSV: https://osv.dev/vulnerability/CVE-2022-48873

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-48873/
Summaries are generated and may contain mistakes; the official description above is the record.