CVE-2026-84698 PX4 Autopilot sd_bench Heap Buffer Overflow via Block Size
Attackers can trigger a heap buffer overflow in PX4 Autopilot's sd_bench command, potentially leading to code execution or system crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-84698?
CVE-2026-84698 is a high-severity memory corruption vulnerability in PX4-Autopilot, published on 2 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
PX4 Autopilot contains a heap buffer overflow vulnerability in the sd_bench command that writes a four-byte block number into a user-supplied sized allocation. Attackers can invoke sd_bench with a block size below four bytes to overflow the heap buffer and potentially execute code or crash the system.
Weakness: CWE-787
Which versions are affected by CVE-2026-84698?
How do I fix CVE-2026-84698?
No fix has been published for CVE-2026-84698 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-84698 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-84698 exists.
Sources
Also known as GHSA-qhw2-8wrm-m9rh.