CVE-2026-42469

Buffer Overflow in OVMS3 CANswitch DLC Parsing Allows Remote Denial or Code Execution

Published May 1, 2026 CVSS 3.1 · 8.6 High EPSS < 1% KEV · Not listed
Description
Buffer overflow vulnerability in Open Vehicle Monitoring System 3 (OVMS3) 3.3.005. In canformat_canswitch.cpp the parser does not properly validate a CANswitch DLC value, allowing remote attackers to cause a denial of service or possibly execute arbitrary code via crafted CANswitch frames.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Openvehicles open Vehicle Monitoring System
Openvehicles open Vehicle Monitoring System Firmware
CPEs cpe:2.3:h:openvehicles:open_vehicle_monitoring_system:-:*:*:*:*:*:*:*
cpe:2.3:o:openvehicles:open_vehicle_monitoring_system_firmware:3.3.005:*:*:*:*:*:*:*
Vendors & Products Openvehicles open Vehicle Monitoring System
Openvehicles open Vehicle Monitoring System Firmware
Type Values Removed Values Added
First Time appeared Openvehicles
Openvehicles open Vehicle Monitoring System 3
Vendors & Products Openvehicles
Openvehicles open Vehicle Monitoring System 3
Type Values Removed Values Added
Title Buffer Overflow in OVMS3 CANswitch DLC Parsing Allows Remote Denial or Code Execution
Type Values Removed Values Added
Weaknesses CWE-121
Metrics cvssV3_1

{'score': 8.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Buffer overflow vulnerability in Open Vehicle Monitoring System 3 (OVMS3) 3.3.005. In canformat_canswitch.cpp the parser does not properly validate a CANswitch DLC value, allowing remote attackers to cause a denial of service or possibly execute arbitrary code via crafted CANswitch frames.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
May 7, 2026, 6:42 PM
Reserved
Apr 27, 2026, 12:00 AM
Status
Analyzed
Published
May 1, 2026, 5:16 PM
Modified
Nov 8, 2026, 4:10 PM