Medium severity · published Sep 2, 2026
CVE-2026-84698
PX4 Autopilot sd_bench Heap Buffer Overflow via Block Size
6.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PX
PX4-Autopilot · PX4
through 1.17.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-84698
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-84698
github.com
https://github.com/PX4/PX4-Autopilot
github.com
https://github.com/PX4/PX4-Autopilot/blob/v1.17.0/src/systemcmds/sd_bench/sd_bench.cpp
github.com
https://github.com/PX4/PX4-Autopilot/issues/28373
www.vulncheck.com
https://www.vulncheck.com/advisories/px4-autopilot-sd-bench-heap-buffer-overflow-via-block-size
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