Overview
CVE-2025-11131 is a high-severity vulnerability affecting the nr modem component. This vulnerability stems from improper input validation, potentially allowing an attacker to trigger a system crash, leading to a remote Denial of Service (DoS) condition. No additional execution privileges are required to exploit this flaw, making it a significant security concern.
Technical Details
The core issue lies within the nr modem’s handling of specific input. Due to insufficient validation, a crafted input can trigger a buffer overflow or other memory corruption error, causing the modem to crash. The exact nature of the vulnerable input and the specific memory corruption technique used are detailed within the vendor’s advisory (see References). Attackers can potentially exploit this vulnerability remotely by sending malicious network packets or SMS messages crafted to trigger the flawed input validation logic within the nr modem component.
CVSS Analysis
The Common Vulnerability Scoring System (CVSS) assigns CVE-2025-11131 a score of 7.5, classifying it as HIGH severity. This score reflects the following factors:
- Attack Vector (AV): Network
- Attack Complexity (AC): Low
- Privileges Required (PR): None
- User Interaction (UI): None
- Scope (S): Unchanged
- Confidentiality Impact (C): None
- Integrity Impact (I): None
- Availability Impact (A): High
The high availability impact underscores the DoS nature of the vulnerability.
Possible Impact
Successful exploitation of CVE-2025-11131 can result in:
- Denial of Service (DoS): Affected devices become unresponsive, disrupting communication services.
- Device Instability: Frequent crashes may occur, leading to a degraded user experience.
- Network Disruption: Widespread exploitation could impact network infrastructure reliant on the vulnerable modem component.
Mitigation or Patch Steps
The primary mitigation strategy is to apply the patch or update provided by the vendor. Follow these steps:
- Identify Affected Devices: Determine which devices in your environment utilize the vulnerable nr modem component.
- Apply Vendor Patches: Obtain and install the official security update or patch from the device manufacturer or Unisoc.
- Monitor for Exploitation: Implement network monitoring and intrusion detection systems to identify and respond to potential exploitation attempts.
- Implement Network Segmentation: Where possible, isolate vulnerable devices to limit the potential impact of a successful attack.
