Vulnerability · Published Sep 2, 2026 · Assigned by VulnCheck
CVE-2026-84698PX4 Autopilot sd_bench Heap Buffer Overflow via Block Size
Medium 6.5
In plain English
A medium-severity out-of-bounds write in PX4-Autopilot from PX4. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.4%top 62.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| PX4 | PX4-Autopilot | 0 – through 1.17.0 |
Weakness: CWE-787 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/PX4/PX4-Autopilot product
- https://github.com/PX4/PX4-Autopilot/issues/28373 issue-tracking
- https://github.com/PX4/PX4-Autopilot/blob/v1.17.0/src/systemcmds/sd_bench/sd_bench.cpp technical-description
- VulnCheck Advisory: PX4 Autopilot sd_bench Heap Buffer Overflow via Block Size third-party-advisory