# CVE-2023-54284: media: av7110: prevent underflow in write_ts_to_decoder()

> A missing bounds check in the av7110 media driver allows an integer underflow, potentially leading to denial of service.

- **Severity:** High 7.1 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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:** 30 Dec 2025
- **Updated:** 5 Aug 2026
- **Also known as:** BELL-CVE-2023-54284, DEBIAN-CVE-2023-54284, GHSA-rj9v-3cx4-5wvc, UBUNTU-CVE-2023-54284

## What is CVE-2023-54284?

CVE-2023-54284 is a high-severity vulnerability in Linux, published on 30 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:

media: av7110: prevent underflow in write_ts_to_decoder()

The buf[4] value comes from the user via ts_play().  It is a value in
the u8 range.  The final length we pass to av7110_ipack_instant_repack()
is "len - (buf[4] + 1) - 4" so add a check to ensure that the length is
not negative.  It's not clear that passing a negative len value does
anything bad necessarily, but it's not best practice.

With the new bounds checking the "if (!len)" condition is no longer
possible or required so remove that.

## Which versions are affected by CVE-2023-54284?


## How do I fix CVE-2023-54284?

Apply the vendor's patch.

## Is CVE-2023-54284 being exploited?

There is no known exploitation of CVE-2023-54284 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-54284 and fix it if it is affected.

What it is: CVE-2023-54284 is a high-severity vulnerability in Linux, published on 30 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-2023-54284 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-2023-54284/ (Markdown: https://insights.sbomify.com/CVE-2023-54284/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-54284
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-54284
- OSV: https://osv.dev/vulnerability/CVE-2023-54284

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-54284/
Summaries are generated and may contain mistakes; the official description above is the record.