CVE-2025-59612: Qualcomm Cologne Use After Free Vulnerability

CVE-2025-59612 Overview

CVE-2025-59612 is a stack-based buffer overflow [CWE-121] affecting Qualcomm Windows drivers across a wide range of Snapdragon compute platforms, FastConnect connectivity chipsets, and audio codec firmware. The flaw occurs when the driver processes an incorrect trusted application request, leading to memory corruption in kernel-mode context. A local authenticated attacker with high privileges can exploit the issue to compromise confidentiality, integrity, and availability of the affected system. Qualcomm disclosed the issue in its June 2026 Security Bulletin alongside coordinated patches for OEMs.

Critical Impact

Successful exploitation enables kernel-level memory corruption on devices running affected Qualcomm Windows drivers, potentially allowing privilege escalation or full system compromise from a local context.

Affected Products

• Qualcomm Snapdragon 8cx Gen 3 Compute Platform and Snapdragon 7c+ Gen 3 Compute firmware
• Qualcomm FastConnect 6700, 6900, and 7800 connectivity chipsets and firmware
• Qualcomm WCD937x/WCD938x audio codecs, WSA883x/WSA884x smart speaker amplifiers, and SC8380XP platform firmware

Discovery Timeline

• 2026-06-01 - CVE-2025-59612 published to NVD
• 2026-06-02 - Last updated in NVD database
• June 2026 - Qualcomm publishes the Qualcomm Security Bulletin June 2026

Technical Details for CVE-2025-59612

Vulnerability Analysis

The vulnerability is a stack-based buffer overflow [CWE-121] inside Qualcomm Windows drivers responsible for handling trusted application requests. When a caller submits a malformed or incorrectly sized request, the driver writes beyond the bounds of a fixed-size stack buffer. The overflow corrupts adjacent stack memory including return addresses and saved registers in kernel context. Because the driver runs with high privilege on the Windows host, corrupted control flow can pivot execution to attacker-controlled instructions. Exploitation requires local access and existing high-privilege credentials, which constrains remote attack surface but remains a concern in multi-tenant or post-compromise scenarios.

Root Cause

The root cause is missing or insufficient length validation on input fields contained in trusted application request structures. The driver trusts caller-supplied size metadata and copies data into a stack-allocated buffer without bounds checks. Any request crafted to exceed the buffer size triggers deterministic stack corruption.

Attack Vector

An attacker with local high-privilege access on a Windows device powered by an affected Qualcomm Snapdragon compute platform can craft an incorrect trusted application request and submit it through the driver's IOCTL or service interface. Processing the malformed request triggers the stack overflow within the driver, corrupting kernel-mode memory. No user interaction is required, and exploitation occurs entirely on the local machine.

Verified exploit code is not publicly available. See the Qualcomm Security Bulletin June 2026 for vendor-confirmed technical details.

Detection Methods for CVE-2025-59612

Indicators of Compromise

• Unexpected Windows kernel bug checks (BSOD) referencing Qualcomm driver modules such as those associated with FastConnect, WCD, or WSA firmware components.
• Driver crash dumps in C:\Windows\Minidump\ showing stack corruption originating in Qualcomm trusted application request handlers.
• Event Log entries (System channel) reporting driver faults or service restarts tied to Qualcomm Snapdragon compute platform components.

Detection Strategies

• Monitor Windows Event Tracing (ETW) and kernel crash telemetry for repeated driver faults in Qualcomm signed kernel modules.
• Hunt for processes invoking unusual IOCTL codes against Qualcomm driver device objects, particularly those associated with trusted application interfaces.
• Correlate local privilege escalation indicators with subsequent kernel-mode driver crashes on Snapdragon-based Windows endpoints.

Monitoring Recommendations

• Collect and centralize Windows kernel crash dumps and driver telemetry from Snapdragon-powered fleets for analysis.
• Track installed Qualcomm driver versions across endpoints and alert on devices running pre-patch firmware identified in the June 2026 bulletin.
• Baseline normal IOCTL traffic to Qualcomm driver interfaces and alert on anomalous request sizes or rates.

How to Mitigate CVE-2025-59612

Immediate Actions Required

• Inventory Windows-on-Snapdragon devices and identify systems running affected Qualcomm firmware and driver versions listed in the bulletin.
• Apply OEM-provided firmware and driver updates as soon as they are distributed by the device manufacturer (Microsoft, Lenovo, HP, Samsung, and others).
• Restrict local administrative access on affected endpoints to limit the population of users able to invoke vulnerable driver interfaces.

Patch Information

Qualcomm has released fixes through OEM partners as documented in the Qualcomm Security Bulletin June 2026. Customers should obtain updated firmware and driver packages from their device manufacturer's update channel, since Qualcomm distributes patches through downstream OEMs rather than directly to end users.

Workarounds

• Enforce least privilege so that standard users cannot obtain the high-privilege context required to reach the vulnerable driver path.
• Enable Windows Hypervisor-Protected Code Integrity (HVCI) and Virtualization-Based Security (VBS) to raise the cost of kernel-mode exploitation.
• Where operationally acceptable, disable or restrict access to optional Qualcomm components (such as unused audio codec or wireless features) until patches are deployed.

# Check installed Qualcomm driver versions on Windows (PowerShell)
Get-WmiObject Win32_PnPSignedDriver | 
  Where-Object { $_.Manufacturer -like "*Qualcomm*" } | 
  Select-Object DeviceName, DriverVersion, DriverDate | 
  Format-Table -AutoSize