CVE-2026-32708

HighPublic PoC

Published: 16 March 2026

Published

16 March 2026

Modified

17 March 2026

KEV Added

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Patch

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CVSS Score 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0002 6.0th percentile

Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-32708 is a high-severity Stack-based Buffer Overflow (CWE-121) vulnerability in Dronecode Px4 Drone Autopilot. Its CVSS base score is 7.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 6.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-16 (Memory Protection).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploitation for Privilege Escalation (T1068). What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-10 Information Input Validation good match

prevent

Directly requires bounds checking and validation of incoming payload lengths to prevent unbounded stack VLA allocation from oversized Zenoh messages.

SI-16 Memory Protection good match

prevent

Implements memory protection mechanisms like stack canaries or ASLR to detect and prevent exploitation or crashes from stack overflows.

SI-2 Flaw Remediation good match

preventrecover

Ensures timely identification, reporting, and patching of the buffer overflow flaw as fixed in PX4 1.17.0-rc2.

MITRE ATT&CK Enterprise TechniquesAI

T1068 Exploitation for Privilege Escalation Privilege Escalation

Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.

attack.mitre.org →

Why these techniques?

Stack-based buffer overflow with local attack vector and low privileges leading to high confidentiality/integrity/availability impact directly enables local exploitation for privilege escalation (T1068). Remote publisher mention and crash outcome introduce minor uncertainty on exact post-exploit impact.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v18.1

NVD Description

PX4 autopilot is a flight control solution for drones. Prior to 1.17.0-rc2, the Zenoh uORB subscriber allocates a stack VLA directly from the incoming payload length without bounds. A remote Zenoh publisher can send an oversized fragmented message to force…

an unbounded stack allocation and copy, causing a stack overflow and crash of the Zenoh bridge task. This vulnerability is fixed in 1.17.0-rc2.

Deeper analysisAI

CVE-2026-32708 is a stack-based buffer overflow vulnerability (CWE-121) in PX4 Autopilot, an open-source flight control solution for drones. In versions prior to 1.17.0-rc2, the Zenoh uORB subscriber allocates a stack variable-length array (VLA) directly based on the incoming payload length without performing bounds checks. This flaw allows processing of oversized payloads to trigger unbounded stack allocation and copying.

A remote Zenoh publisher can exploit the vulnerability by sending an oversized fragmented message, leading to a stack overflow and crash of the Zenoh bridge task. According to the CVSS v3.1 base score of 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), exploitation requires local access, low attack complexity, and low privileges, but results in high impacts to confidentiality, integrity, and availability.

The vulnerability is addressed in PX4 Autopilot version 1.17.0-rc2. The official security advisory on GitHub (GHSA-69g4-hcqf-j45p) provides details on the fix and recommends updating to the patched release for mitigation.