CVE-2025-47314: Qualcomm QAM8255P Use-After-Free Vulnerability

CVE-2025-47314 Overview

CVE-2025-47314 is a memory corruption vulnerability affecting a broad set of Qualcomm automotive and connectivity platforms. The flaw occurs while the affected component processes data sent by the Front-End (FE) driver, allowing a local, low-privileged attacker to corrupt kernel or driver memory. Successful exploitation can lead to loss of confidentiality, integrity, and availability on affected devices. The vulnerability is classified under CWE-20: Improper Input Validation and was published in Qualcomm's September 2025 security bulletin.

Critical Impact
A local attacker with low privileges can trigger memory corruption in Qualcomm firmware components, potentially resulting in arbitrary code execution or system compromise across dozens of automotive and Wi-Fi/Bluetooth chipsets.

Affected Products

Qualcomm Snapdragon Auto platforms including SA8155P, SA8195P, SA8255P, SA8295P, SA8540P, SA8620P, SA8650P, SA8770P, SA8775P, and SA9000P
Qualcomm QAM-series automotive modules including QAM8255P, QAM8295P, QAM8620P, QAM8650P, QAM8775P, QAMSRV1H, and QAMSRV1M
Qualcomm QCA connectivity chipsets including QCA6574AU, QCA6595, QCA6595AU, QCA6688AQ, QCA6696, QCA6698AQ, and QCA6797AQ

Discovery Timeline

2025-09-24 - CVE CVE-2025-47314 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-47314

Vulnerability Analysis

The vulnerability resides in the code path that consumes data from the Front-End (FE) driver. The consuming component fails to properly validate the structure, size, or contents of incoming data buffers. When crafted input reaches this path, memory corruption occurs within the driver or firmware context. The flaw impacts confidentiality, integrity, and availability, and requires only local access with low privileges to trigger. No user interaction is needed for exploitation.

Root Cause

The root cause is improper input validation ([CWE-20]) in the interface that processes data forwarded by the FE driver. The receiving component trusts driver-supplied fields without enforcing strict bounds or type checks. Attacker-controlled data can therefore drive out-of-bounds writes, type confusion, or other memory-safety violations inside a privileged execution context.

Attack Vector

Exploitation requires local access to an affected device and the ability to interact with, or influence data passing through, the FE driver interface. An attacker executing code with low privileges can send malformed data that reaches the vulnerable processing routine. Because the corruption occurs in a driver-level component, successful exploitation can escalate privileges or destabilize the platform. Public proof-of-concept code is not currently available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

No verified public exploit code is available. Refer to the Qualcomm September 2025 Security Bulletin for technical guidance from the vendor.

Detection Methods for CVE-2025-47314

Indicators of Compromise

Unexpected kernel panics, driver faults, or device reboots on affected Qualcomm automotive or connectivity platforms
Crash logs referencing the FE driver or associated firmware processing routines
Anomalous local processes with driver ioctl access attempting to write malformed structures

Detection Strategies

Monitor device telemetry for repeated crashes or watchdog resets originating from affected firmware components
Audit local processes that interact with Qualcomm driver interfaces, particularly those handling FE driver data
Correlate firmware version inventory against Qualcomm's September 2025 bulletin to identify unpatched devices

Monitoring Recommendations

Enable and centralize collection of kernel and driver crash dumps from vehicles, embedded systems, and connectivity gateways using Qualcomm chipsets
Track OEM firmware release cadence and verify that Qualcomm patch levels are propagated through the supply chain
Alert on privilege-escalation attempts or unexpected code loaded on automotive compute platforms

How to Mitigate CVE-2025-47314

Immediate Actions Required

Inventory all deployed devices containing the affected Qualcomm chipsets listed in the September 2025 bulletin
Coordinate with device OEMs and Tier 1 suppliers to obtain and deploy firmware updates that include Qualcomm's fix
Restrict local access on affected platforms to trusted, authenticated users and processes

Patch Information

Qualcomm has published fixes as part of its September 2025 security bulletin. Downstream OEMs must integrate the updated firmware into their platform builds and deliver over-the-air or serviced updates to end devices. Review the Qualcomm September 2025 Security Bulletin for the authoritative list of affected components and patch guidance.

Workarounds

Limit or disable local execution paths that can reach the FE driver interface where operationally feasible
Apply strict application allow-listing on affected embedded platforms to reduce local attack surface
Enforce secure boot and firmware integrity verification to detect tampering on impacted devices

bash

# Verify firmware/patch level on affected Qualcomm-based systems (example command)
# Actual commands vary by OEM platform - consult vendor documentation
getprop ro.build.version.security_patch