CVE-2026-24801: Ralim IronOS Cryptographic Vulnerability

CVE-2026-24801 Overview

A cryptographic vulnerability has been identified in Ralim IronOS, specifically within the TinyCrypt library's Elliptic Curve Cryptography Digital Signature Algorithm (ECC DSA) implementation. The vulnerability is located in the ecc_dsa.c file under the source/Core/BSP/Pinecilv2/bl_mcu_sdk/components/ble/ble_stack/common/tinycrypt/source module path.

This vulnerability affects the Bluetooth Low Energy (BLE) stack used by the Pinecil v2 soldering iron firmware, potentially compromising the cryptographic operations that secure BLE communications.

Critical Impact

Physical access exploitation could lead to high confidentiality and integrity impact on the affected device and subsequent systems relying on compromised cryptographic operations.

Affected Products

• Ralim IronOS versions prior to v2.23-rc3
• Pinecil v2 devices running vulnerable IronOS firmware
• Devices utilizing the affected TinyCrypt ECC DSA module

Discovery Timeline

• 2026-01-27 - CVE-2026-24801 published to NVD
• 2026-01-27 - Last updated in NVD database

Technical Details for CVE-2026-24801

Vulnerability Analysis

This vulnerability resides in the TinyCrypt cryptographic library's ECC DSA implementation, which is embedded within the BLE stack of IronOS firmware for Pinecil v2 devices. The affected code in ecc_dsa.c handles elliptic curve digital signature generation and verification, a critical component for authenticating BLE communications.

The vulnerability requires physical access to exploit, indicating that an attacker would need direct proximity to the target device. Once exploited, the vulnerability can result in high confidentiality and integrity impact not only on the vulnerable device itself but potentially on subsequent systems that rely on the compromised cryptographic operations.

The TinyCrypt library is a minimal cryptographic implementation designed for constrained embedded environments. While optimized for resource-limited devices like the Pinecil soldering iron, implementations must carefully handle edge cases in elliptic curve arithmetic to prevent cryptographic weaknesses.

Root Cause

The root cause lies within the ecc_dsa.c source file in the TinyCrypt library. Cryptographic implementations of ECC DSA require precise handling of mathematical operations, nonce generation, and boundary conditions. Flaws in any of these areas can lead to signature forgery, key recovery, or other cryptographic attacks.

The specific nature of the flaw in this implementation affects the BLE stack's ability to properly authenticate and secure communications, potentially allowing an attacker with physical access to compromise the cryptographic guarantees of the system.

Attack Vector

The attack vector is physical, meaning an attacker must have direct physical access to the vulnerable device to exploit this vulnerability. This typically involves:

1. Physical proximity to a Pinecil v2 device running vulnerable IronOS firmware
2. Interaction with the device's BLE interface
3. Exploitation of the cryptographic weakness in the ECC DSA implementation
4. Potential compromise of signed data integrity and confidentiality

The physical access requirement limits the attack surface but does not eliminate risk, particularly in shared workspaces, makerspaces, or supply chain scenarios where devices may be accessible to untrusted parties.

For detailed technical information about the vulnerability and the corresponding fix, refer to the IronOS Pull Request #2087.

Detection Methods for CVE-2026-24801

Indicators of Compromise

• Unexpected BLE pairing attempts or connection requests to Pinecil v2 devices
• Anomalous firmware behavior or configuration changes not initiated by the user
• Evidence of physical tampering with the device

Detection Strategies

• Verify IronOS firmware version is v2.23-rc3 or later using device settings menu
• Audit BLE connection logs if available for suspicious activity patterns
• Implement physical security controls and inventory tracking for vulnerable devices

Monitoring Recommendations

• Maintain an inventory of all Pinecil v2 devices and their firmware versions in your environment
• Monitor firmware update channels for new security releases from the IronOS project
• Consider network segmentation to isolate IoT devices including BLE-enabled soldering equipment

How to Mitigate CVE-2026-24801

Immediate Actions Required

• Update IronOS firmware to version v2.23-rc3 or later immediately
• Restrict physical access to affected devices until patched
• Review BLE security settings and disable BLE functionality if not required

Patch Information

The vulnerability has been addressed in IronOS version v2.23-rc3. The fix is documented in Pull Request #2087 on the official IronOS GitHub repository. Users should download and flash the updated firmware to remediate this vulnerability.

To update your device:

1. Download the latest IronOS release from the official GitHub releases page
2. Follow the standard firmware update procedure for your Pinecil v2 device
3. Verify the firmware version after update to confirm successful patching

Workarounds

• Disable Bluetooth/BLE functionality on the device if not essential for your workflow
• Implement strict physical access controls to limit exposure to potential attackers
• Isolate affected devices from sensitive environments until the firmware can be updated
• Monitor for any unauthorized physical access to devices in shared spaces

# Verify firmware version after update
# Access the device settings menu and navigate to:
# Settings > About > Firmware Version
# Confirm version displays v2.23-rc3 or higher