CVE-2026-84698
PX4 Autopilot sd_bench Heap Buffer Overflow via Block Size
- State
- Published
- Severity
- 7.1 High
- Published
- Sep 2, 2026
- Updated
- Sep 4, 2026
- Reserved
- Sep 1, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.1 High | 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 | VulnCheck |
| 3.1 | 6.5 Medium | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-787 Out-of-bounds Write
Affected Products
| Product | Versions |
|---|---|
PX4-AutopilotPX4 |
|
References
- https://github.com/PX4/PX4-Autopilotproduct
- https://github.com/PX4/PX4-Autopilot/issues/28373issue-tracking
- https://github.com/PX4/PX4-Autopilot/blob/v1.17.0/src/systemcmds/sd_bench/sd_bench.cpptechnical-description
- VulnCheck Advisory: PX4 Autopilot sd_bench Heap Buffer Overflow via Block Sizethird-party-advisory
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