CVE-2025-47355 is a memory corruption vulnerability classified as an out-of-bounds write (CWE-787) found in Qualcomm Snapdragon and associated FastConnect and WCD chipsets. The issue occurs during the processing of remote procedure IOCTL calls, which are used for device control operations at the kernel or driver level. An attacker with low privileges (PR:L) but local access can exploit this vulnerability without requiring user interaction (UI:N) to write beyond allocated memory boundaries. This can lead to arbitrary code execution, privilege escalation, or system crashes, affecting confidentiality, integrity, and availability. The affected products include a wide range of Snapdragon SoCs and connectivity modules such as FastConnect 6700/6900/7800, Snapdragon 7c+ Gen 3 Compute, Snapdragon 8cx Gen 3 Compute, and various WCD and WSA series chips. The vulnerability has a CVSS 3.1 base score of 7.8, indicating high severity, with low attack complexity and no need for user interaction, but requiring local privileges. No patches or known exploits are currently available, but the broad deployment of these chipsets in smartphones, laptops, and IoT devices makes this a critical issue to address promptly.

The impact of CVE-2025-47355 is significant due to the potential for arbitrary code execution and system compromise on devices using affected Qualcomm Snapdragon and related chipsets. Exploitation could allow attackers to escalate privileges, bypass security controls, and gain persistent access to sensitive data or system functions. This threatens confidentiality by exposing private information, integrity by enabling unauthorized code execution or modification, and availability by causing system instability or denial of service. Given the widespread use of these chipsets in mobile phones, laptops, and wireless connectivity devices globally, the vulnerability could affect millions of users and enterprise environments. Attackers with local access, such as malicious apps or insiders, could leverage this flaw to compromise devices, making it a critical concern for device manufacturers, mobile carriers, and enterprises relying on Qualcomm hardware.

To mitigate CVE-2025-47355, organizations and device manufacturers should: 1) Monitor Qualcomm and vendor advisories closely and apply security patches or firmware updates as soon as they become available. 2) Restrict access to IOCTL interfaces by enforcing strict privilege separation and limiting which processes or users can invoke these calls. 3) Employ runtime protections such as memory protection mechanisms (e.g., DEP, ASLR) and kernel integrity checks to reduce exploitation likelihood. 4) Conduct thorough code audits and fuzz testing on IOCTL handlers in affected drivers to identify and remediate similar vulnerabilities proactively. 5) For enterprises, implement endpoint detection and response (EDR) solutions to monitor for suspicious local privilege escalation attempts. 6) Educate users to avoid installing untrusted applications that could exploit local vulnerabilities. 7) Consider network segmentation and device hardening to limit attacker lateral movement if compromise occurs. These targeted steps go beyond generic advice by focusing on controlling IOCTL access and preparing for rapid patch deployment.