CVE-2026-92154 F´: File size bounds bypass in Svc::FileUplink via unsigned integer overflow in DATA packet validation
An attacker can bypass file size bounds in F Prime's FileUplink service via integer overflow, causing data corruption or resource exhaustion.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-92154?
CVE-2026-92154 is a high-severity vulnerability in nasa fprime, published on 14 Oct 2026. Any signed-in user can exploit it over the network, 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, Svc::FileUplink handleDataPacket offset and size validation is vulnerable because the component checks byteOffset plus dataSize with wrapping U32 arithmetic and then seeks to the large attacker-controlled offset before writing. When a file-uplink DATA packet supplies a byteOffset and dataSize whose unsigned sum wraps below the declared file size, data can be written beyond the declared upload size, causing file integrity loss and potentially large sparse-file growth or resource exhaustion. This issue is fixed in version 4.2.0.
Weakness: CWE-190
Which versions are affected by CVE-2026-92154?
How do I fix CVE-2026-92154?
No fix has been published for CVE-2026-92154 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-92154 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-92154 exists.
Sources
Also known as GHSA-wx8q-q5gx-f54p.