CVE-2026-32706

PX4 autopilot has a global buffer overflow in crsf_rc via oversized variable-length known packet

State: Published
Severity: 7.1 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 crsf_rc parser accepts an oversized variable-length known packet and copies it into a fixed 64-byte global buffer without a bounds check. In deployments where crsf_rc is enabled on a CRSF serial port, an adjacent/raw-serial attacker can trigger memory corruption and crash PX4. This vulnerability is fixed in 1.17.0-rc2.

Scores

CVSS	Score	Vector	Source
3.1	7.1 High	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H	GitHub_M

Weaknesses

CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-787 Out-of-bounds Write

Affected Products

Product	Versions
PX4-AutopilotPX4	< 1.17.0-rc2Affected

References

https://github.com/PX4/PX4-Autopilot/security/advisories/GHSA-mqgj-hh4g-fg5p

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