Is CVE-2026-102809 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-102809 being exploited in the wild.

How severe is CVE-2026-102809?

Medium severity, with a CVSS score of 6.5, published 29 September 2026.

Is there a fix for CVE-2026-102809?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-102809 attacked?

It is attacked with local access, in device firmware.

Am I affected by CVE-2026-102809?

Check whether you run Px4 Autopilot at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-102809: PX4 Autopilot stack overflow in file2 test command

CVE-2026-102809 · Severity: medium · CVSS 6.5 · Published 2026-09-29

PX4 Autopilot is flight control software used in drones and unmanned aircraft. A vulnerability in a diagnostic command allows attackers with shell access to crash the flight controller by providing an excessively large parameter, potentially causing a loss of control during flight.

Technologies: Px4 Autopilot. Vendors: Px4.

Quick answers

Is CVE-2026-102809 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-102809 being exploited in the wild.
How severe is CVE-2026-102809?: Medium severity, with a CVSS score of 6.5, published 29 September 2026.
Which products and versions are affected?: Px4 Autopilot through 1.17.0.
Is there a fix for CVE-2026-102809?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-102809 attacked?: It is attacked with local access, in device firmware.
Am I affected by CVE-2026-102809?: Check whether you run Px4 Autopilot at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The file2 test command fails to validate the write chunk size parameter (-c option), allowing uncontrolled stack allocation. An attacker with local shell access can supply a large value to trigger a stack overflow, causing denial of service. A fix is available in versions after 1.17.0.

Affected products

PX4 Autopilot through 1.17.0

Timeline

2026-09-29: disclosed

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.