What is CVE-2026-102809?

CVE-2026-102809 is a medium-severity vulnerability in Px4 Px4-Autopilot, classified under CWE-789. CVSS score: 6.5/10. Published 2026-09-29.

How severe is CVE-2026-102809?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Px4 Px4-Autopilot

CVE-2026-102809

PX4 Autopilot through 1.17.0 contains an uncontrolled stack allocation vulnerability in the file2 test command that fails to validate the write chunk size parameter. Attackers with shell access can supply an excessively large value to the -c option to trigger stack overflow and crash the flight controller.

Published 2026-09-29 · last modified 2026-09-29.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Px4 Px4-Autopilot

Weakness classification (CWE)

CWE-789

References

github.com/PX4/PX4-Autopilot/pull/28586 (issue-tracking, patch)
github.com/PX4/PX4-Autopilot/commit/46a77d8ad15e7929ef261c41083dffd1bbfa9f85 (patch)
github.com/PX4/PX4-Autopilot/blob/d6f12ad1c4f70ad3230afd7d86e971421e02fef4/src/… (technical-description)
github.com/PX4/PX4-Autopilot (product)
www.vulncheck.com/advisories/px4-autopilot-through-1.17.0-stack-exhaustion-via-… (third-party-advisory)

Frequently asked questions

What is CVE-2026-102809?: CVE-2026-102809 is a medium-severity vulnerability in Px4 Px4-Autopilot, classified under CWE-789. CVSS score: 6.5/10. Published 2026-09-29.
How severe is CVE-2026-102809?: Medium severity. CVSS v3 base score is 6.5 out of 10.