# CVE-2026-92155: F´: FileUplink Unknown Packet Type Assertion DoS

> An attacker can cause a denial of service in F Prime applications by sending network packets with unknown file-packet types, triggering an assertion failure.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Oct 2026
- **Updated:** 15 Oct 2026
- **Also known as:** GHSA-3534-8qg7-6cf5

## What is CVE-2026-92155?

CVE-2026-92155 is a high-severity denial of service vulnerability in nasa fprime, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

F´ (F Prime) is a framework that enables development and deployment of spaceflight and other embedded software applications. Prior to 4.2.0, Fw::FilePacket deserialization used by Svc::FileUplink is vulnerable because Header deserialization casts the byte to the Type enum without validating its range and FilePacket::fromSerialBuffer reaches a default FW_ASSERT. When a network file packet contains an unknown file-packet type byte, the assertion aborts or resets the default Ref application process, causing denial of service. This issue is fixed in version 4.2.0.

Weakness: CWE-617 (Reachable Assertion)

## Which versions are affected by CVE-2026-92155?


## How do I fix CVE-2026-92155?

No fix has been published for CVE-2026-92155 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-92155 being exploited?

There is no known exploitation of CVE-2026-92155 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-92155 and fix it if it is affected.

What it is: CVE-2026-92155 is a high-severity denial of service vulnerability in nasa fprime, published on 14 Oct 2026. 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-2026-92155 in the wild and no public exploit code.

Affected product: nasa fprime. 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-2026-92155/ (Markdown: https://insights.sbomify.com/CVE-2026-92155/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-92155
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-92155
- OSV: https://osv.dev/vulnerability/CVE-2026-92155

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-92155/
Summaries are generated and may contain mistakes; the official description above is the record.