CVE-2026-32708

Zenoh uORB Subscriber Allows Arbitrary Stack Allocation (PX4/PX4-Autopilot)

State: Published
Severity: 7.8 High
Published: Mar 13, 2026
Updated: Mar 17, 2026
Reserved: Mar 13, 2026

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.

Scores

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

Weaknesses

CWE-121 Stack-based Buffer Overflow

Affected Products

Product	Versions
PX4-AutopilotPX4	< 1.17.0-rc2Affected

References

https://github.com/PX4/PX4-Autopilot/security/advisories/GHSA-69g4-hcqf-j45p

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