# CVE-2022-50758: staging: vt6655: fix potential memory leak

> A memory leak in the vt6655 staging driver can lead to resource exhaustion and denial of service.

- **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:** DEBIAN-CVE-2022-50758, GHSA-35g5-mqjg-qfr4, UBUNTU-CVE-2022-50758

## What is CVE-2022-50758?

CVE-2022-50758 is a high-severity denial of service 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:

staging: vt6655: fix potential memory leak

In function device_init_td0_ring, memory is allocated for member
td_info of priv->apTD0Rings[i], with i increasing from 0. In case of
allocation failure, the memory is freed in reversed order, with i
decreasing to 0. However, the case i=0 is left out and thus memory is
leaked.

Modify the memory freeing loop to include the case i=0.

## Which versions are affected by CVE-2022-50758?


## How do I fix CVE-2022-50758?

Apply the vendor's patch.

## Is CVE-2022-50758 being exploited?

There is no known exploitation of CVE-2022-50758 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-50758 and fix it if it is affected.

What it is: CVE-2022-50758 is a high-severity denial of service 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-2022-50758 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-2022-50758/ (Markdown: https://insights.sbomify.com/CVE-2022-50758/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-50758
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-50758
- OSV: https://osv.dev/vulnerability/CVE-2022-50758

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-50758/
Summaries are generated and may contain mistakes; the official description above is the record.