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TI-2021-21564 Aliases CVE-2021-46896GHSA-82h7-455m-f9mp

Buffer Overflow vulnerability in PX4-Autopilot allows attackers to cause a denial of…

Priority HIGH 72CWE-120Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.

Summary

Buffer Overflow vulnerability in PX4-Autopilot allows attackers to cause a denial of service via handler function handling msgid 332.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00815 57th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:dronecode:px4_drone_autopilot:-:*:*:*:*:*:*:*not specified by NVDVulnerableDronecode
  • cpe:2.3:a:dronecode:px4_drone_autopilot:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Dronecode

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-46896
  2. 2026-10-03 Alias added: GHSA-82h7-455m-f9mp

References

Exploit 1

  • TI-2023-24883 PX4-Autopilot Heap Buffer Overflow Bug CVSS 3.1CRITICAL 9.8
  • TI-2021-13281 An issue discovered in Yuneec Mantis Q and PX4-Autopilot v 1.11.3 and below allow… CVSS 3.1HIGH 7.5
  • TI-2026-25200 Zenoh uORB Subscriber Allows Arbitrary Stack Allocation (PX4/PX4-Autopilot) CVSS 3.1HIGH 8.0
  • TI-2026-25198 PX4 autopilot has a global buffer overflow in crsf_rc via oversized variable-length known packet CVSS 3.1HIGH 8.1
  • TI-2026-21380 PX4 Autopilot versions 1.12.x through 1.15.x contain a protection mechanism failure in… CVSS 3.1HIGH 8.1
  • TI-2026-21379 PX4 Autopilot versions 1.12.x through 1.15.x contain a logic flaw in the mode switching… CVSS 3.1HIGH 8.1
See all 22 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences