NVIDIA Jetson Linux initrd Command Injection Vulnerability (CVE-2026-24154)

CVE-2026-24154 affects NVIDIA Jetson Linux and stems from a flaw within the initrd (initial RAM disk) process. An unprivileged attacker with physical access to a vulnerable device can inject malicious command-line arguments during the boot process. This injection can subvert the intended system initialization, leading to a variety of severe consequences. The vulnerability was published on March 31, 2026, and has a CVSS v3.1 score of 7.6. The affected versions of Jetson Linux are not specified in the source. Successful exploitation allows attackers to execute arbitrary code, escalate privileges, cause denial of service, tamper with data, and disclose sensitive information. Defenders should focus on securing physical access and monitoring boot processes for unauthorized modifications.

Attack Chain

1. Attacker gains physical access to the NVIDIA Jetson device.
2. Attacker interrupts the boot process to gain access to the bootloader. This may involve pressing specific keys during startup or utilizing hardware tools.
3. Attacker modifies the kernel command line arguments passed to the initrd. This is achieved by manipulating bootloader settings.
4. The modified command line arguments inject malicious commands or alter the execution path within the initrd environment.
5. During initrd execution, the injected commands are processed, leading to code execution within the early boot environment. This bypasses normal user authentication and security measures.
6. The attacker leverages the initial code execution to escalate privileges by exploiting vulnerabilities within the initrd environment or system binaries.
7. With escalated privileges, the attacker gains control over the system, enabling them to install persistent backdoors, tamper with system configurations, or exfiltrate sensitive data.
8. The final objective is achieved, which can range from complete system compromise and data theft to denial-of-service attacks.

Impact

Successful exploitation of CVE-2026-24154 can lead to a complete compromise of the NVIDIA Jetson Linux device. The attacker can achieve code execution, escalate privileges, and gain persistent access. This could result in data breaches, system instability, and the deployment of malicious software. While the number of potential victims and specific sectors targeted are not mentioned in the source, the vulnerability affects devices used in various embedded systems, robotics, and edge computing applications.

Recommendation

• Restrict physical access to NVIDIA Jetson devices to prevent unauthorized manipulation of the boot process.
• Monitor boot logs and system events for unusual command-line arguments or modifications to the initrd environment. Deploy the Sigma rule Detect Modified Kernel Command Line to identify suspicious boot activity.
• Consider implementing secure boot mechanisms to prevent unauthorized modifications to the bootloader and kernel.
• Investigate any unauthorized access attempts or physical tampering with Jetson devices.
• Apply any available patches or updates from NVIDIA to mitigate the vulnerability when they become available via NVIDIA’s customer support portal referenced in the advisory.
• Monitor network connections originating from the device after boot for unexpected or malicious activity, using network connection logs, to identify potential exploitation attempts.