EUVD-2026-69789
GHSA-qhw2-8wrm-m9rh
Severity by source
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Adjacent access required for MAVLink or serial channel; overflow is triggered deterministically by supplying block_size < 4; confirmed impact is crash (DoS), code execution remains speculative.
Primary rating from Vendor (vulncheck).
CVSS VectorVendor: vulncheck
Lifecycle Timeline
2DescriptionCVE.org
PX4 Autopilot contains a heap buffer overflow vulnerability in the sd_bench command that writes a four-byte block number into a user-supplied sized allocation. Attackers can invoke sd_bench with a block size below four bytes to overflow the heap buffer and potentially execute code or crash the system.
AnalysisAI
Heap buffer overflow in PX4 Autopilot's sd_bench command allows adjacent unauthenticated attackers to crash the flight controller or potentially execute arbitrary code by supplying a block size parameter smaller than four bytes. The overflow occurs because a fixed four-byte block number is written into a heap allocation sized by the user-supplied block_size value - when that value is 1, 2, or 3 bytes, the write extends beyond the allocated region. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires adjacent network access to the PX4 autopilot's command interface - specifically, the ability to send commands over MAVLink or via a direct serial or USB connection. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 7.1 with AV:A accurately reflects that exploitation requires adjacent network or physical access to the PX4 autopilot's command interface - the attacker must be on the MAVLink ground control network or have direct serial or USB access to the unit. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patched version is confirmed in available data at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all deployed PX4 Autopilot systems and their firmware versions, immediately disable the sd_bench command via parameter configuration to eliminate the attack surface, and restrict physical and network access to drone MAVLink control interfaces to authorized operators only. …
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Same weakness CWE-787 – Out-of-bounds Write
View allSame technique Buffer Overflow
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External POC / Exploit Code
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