CVE-2026-37540: OpenAMP ELF Loader Integer Overflow Exposes Embedded Systems
The National Vulnerability Database has detailed CVE-2026-37540, a high-severity integer overflow vulnerability (CVSS 8.4) in OpenAMP v2025.10.0’s ELF loader. Specifically, the elf_loader.c component fails to validate attacker-controlled 16-bit values from ELF headers before multiplication. This oversight allows large inputs to wrap around on 32-bit embedded systems, leading to a small product value that can corrupt memory.
This vulnerability is critical for environments utilizing OpenAMP on platforms like STM32MP1, Zynq, and i.MX. An attacker could craft a malicious firmware image that, when parsed by the vulnerable loader, triggers the integer overflow. This can lead to arbitrary code execution or denial-of-service, compromising the integrity and availability of embedded devices.
Defenders must recognize the strategic implications. Embedded systems are often overlooked in vulnerability management, yet they form the bedrock of many critical infrastructures and IoT deployments. An attacker gaining control at this low level bypasses many traditional network and endpoint defenses. Patching this vulnerability is paramount, but organizations must also re-evaluate their entire embedded device security posture, including secure boot, firmware integrity checks, and supply chain security.
What This Means For You
- If your organization deploys embedded systems running OpenAMP, particularly on 32-bit architectures like STM32MP1, Zynq, or i.MX, you are exposed. Prioritize patching OpenAMP to a non-vulnerable version immediately. Furthermore, implement stringent firmware integrity checks and secure boot processes to prevent malicious or malformed firmware from being loaded onto these critical devices. This isn't just about a patch; it's about securing the foundation of your operational technology.
Related ATT&CK Techniques
🛡️ Detection Rules
2 rules · 6 SIEM formats2 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-37540: OpenAMP ELF Loader Integer Overflow in Firmware Parsing
title: CVE-2026-37540: OpenAMP ELF Loader Integer Overflow in Firmware Parsing
id: scw-2026-05-01-ai-1
status: experimental
level: critical
description: |
Detects the loading of ELF files by the elf_loader.c component, which is indicative of the vulnerable OpenAMP ELF loader attempting to parse a firmware image. This rule specifically targets the vulnerable component and file type associated with CVE-2026-37540, indicating potential exploitation of the integer overflow vulnerability.
author: SCW Feed Engine (AI-generated)
date: 2026-05-01
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-37540/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: image_load
detection:
selection:
ImageLoaded|contains:
- 'elf_loader.c'
TargetFilename|contains:
- '.elf'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-37540 | Integer Overflow | OpenAMP v2025.10.0 |
| CVE-2026-37540 | Integer Overflow | Vulnerable file: elf_loader.c |
| CVE-2026-37540 | Integer Overflow | Vulnerable component: ELF loader firmware image parsing |
| CVE-2026-37540 | Integer Overflow | Affected systems: 32-bit embedded systems (STM32MP1, Zynq, i.MX) |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 01, 2026 at 20:16 UTC |
This content was AI-rewritten and enriched by Shimi's Cyber World based on the original source. All intellectual property rights remain with the original author.
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