PX4 PX4-Autopilot up to 1.17.0-rc2 sscanf stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in PX4 PX4-Autopilot up to 1.17.0-rc2. It has been classified as critical. The affected element is the function sscanf. This manipulation causes stack-based overflow. This vulnerability appears as CVE-2026-32743. The attacker needs to be present on the local network. There is no available exploit. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability has been found in PX4 PX4-Autopilot up to 1.17.0-rc2 and classified as critical. Affected by this vulnerability is the function sscanf. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect availability. The summary by CVE is:

PX4 is an open-source autopilot stack for drones and unmanned vehicles. Versions 1.17.0-rc2 and below are vulnerable to Stack-based Buffer Overflow through the MavlinkLogHandler, and are triggered via MAVLink log request. The LogEntry.filepath buffer is 60 bytes, but the sscanf function parses paths from the log list file with no width specifier, allowing a path longer than 60 characters to overflow the buffer. An attacker with MAVLink link access can trigger this by first creating deeply nested directories via MAVLink FTP, then requesting the log list. The flight controller MAVLink task crashes, losing telemetry and command capability and causing DoS. This issue has been fixed in this commit: https://github.com/PX4/PX4-Autopilot/commit/616b25a280e229c24d5cf12a03dbf248df89c474.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-32743 since 03/13/2026. The exploitation appears to be easy. Access to the local network is required for this attack. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

Applying the patch 616b25a280e229c24d5cf12a03dbf248df89c474 is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the databases at CNNVD (CNNVD-202603-3586) and EUVD (EUVD-2026-13003). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (GitHub_M): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 616b25a280e229c24d5cf12a03dbf248df89c474

Timelineinfo

03/13/2026 CVE reserved
03/19/2026 +6 days Advisory disclosed
03/19/2026 +0 days VulDB entry created
03/23/2026 +4 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 616b25a280e229c24d5cf12a03dbf248df89c474
Status: Confirmed

CVE: CVE-2026-32743 (🔒)
GCVE (CVE): GCVE-0-2026-32743
GCVE (VulDB): GCVE-100-351643
EUVD: 🔒
CNNVD: CNNVD-202603-3586 - PX4-Autopilot 安全漏洞

Entryinfo

Created: 03/19/2026 01:40
Updated: 03/23/2026 22:36
Changes: 03/19/2026 01:40 (67), 03/19/2026 02:18 (2), 03/20/2026 18:32 (6), 03/22/2026 02:40 (1), 03/22/2026 17:21 (1), 03/23/2026 22:36 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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