Overview
CVE-2025-61607 is a high-severity vulnerability identified in nr modem. This vulnerability stems from improper input validation, potentially leading to a system crash and resulting in a remote denial of service (DoS). Exploitation of this vulnerability requires no additional execution privileges, making it a significant security concern.
Technical Details
The root cause of CVE-2025-61607 lies within the nr modem’s input validation mechanisms. Specifically, the software fails to adequately sanitize or validate input data received from a remote source. This lack of validation allows an attacker to craft malicious input that, when processed by the modem, triggers a critical error or exception leading to a system crash. The specific details of the vulnerable code section are not publicly available without further reverse engineering and analysis of the affected nr modem implementation.
CVSS Analysis
The Common Vulnerability Scoring System (CVSS) assigns CVE-2025-61607 a score of 7.5, indicating a high severity vulnerability. This score reflects the following factors:
- Attack Vector: Network (AV:N) – The vulnerability can be exploited remotely over a network.
- Attack Complexity: Low (AC:L) – Exploitation requires minimal effort.
- Privileges Required: None (PR:N) – No privileges are needed to exploit the vulnerability.
- User Interaction: None (UI:N) – No user interaction is required.
- Scope: Changed (S:C) – An exploited vulnerability can affect resources beyond the security scope managed by the vulnerability authority.
- Confidentiality Impact: None (C:N) – There is no confidentiality impact.
- Integrity Impact: None (I:N) – There is no integrity impact.
- Availability Impact: High (A:H) – The vulnerability can cause a complete loss of availability (DoS).
Possible Impact
Successful exploitation of CVE-2025-61607 can result in a remote denial of service (DoS) condition. This means that affected devices using the vulnerable nr modem may become unresponsive or completely crash, disrupting their intended functionality. This could have significant implications for:
- Mobile Devices: Loss of cellular connectivity and device functionality.
- IoT Devices: Interruption of critical services reliant on cellular communication.
- Industrial Control Systems: Potential disruption of industrial processes if cellular modems are used for communication.
Mitigation or Patch Steps
To mitigate the risk posed by CVE-2025-61607, users and manufacturers should take the following steps:
- Apply Patches: Check for and apply any available security patches or firmware updates released by the device manufacturer or Unisoc. These patches will likely address the input validation issue and prevent exploitation.
- Network Segmentation: Implement network segmentation to isolate vulnerable devices from critical network infrastructure. This limits the potential impact of a successful attack.
- Monitor Network Traffic: Monitor network traffic for suspicious patterns that may indicate exploitation attempts. Intrusion detection systems (IDS) and intrusion prevention systems (IPS) can be configured to detect and block malicious traffic.
- Consult Vendor Documentation: Refer to the vendor’s documentation and security advisories for specific guidance on mitigating the vulnerability.
References
- CVE ID: CVE-2025-61607
- Unisoc Security Announcement: https://www.unisoc.com/en/support/announcement/1995394837938163714
