CVE-2025-59611 Overview
CVE-2025-59611 is a memory corruption vulnerability affecting Qualcomm diagnostic services across a broad range of Snapdragon compute platforms, FastConnect chipsets, WCD audio codecs, and related firmware. The flaw stems from the absence of input validation in diagnostic service handlers, which leads to an out-of-bounds write condition tracked under [CWE-787]. A local attacker with high privileges can trigger the condition to corrupt memory, compromising confidentiality, integrity, and availability on the affected device. Qualcomm published a fix in the June 2026 security bulletin.
Critical Impact
Successful exploitation enables high-privileged local attackers to corrupt memory in Qualcomm diagnostic services, leading to potential code execution or denial of service across dozens of Snapdragon, FastConnect, and WCD firmware components.
Affected Products
- Qualcomm Snapdragon 7c, 8c, and 8cx Compute Platforms (multiple generations) firmware
- Qualcomm FastConnect 6200, 6700, 6800, 6900, and 7800 firmware
- Qualcomm WCD934x/WCD937x/WCD938x audio codec and WSA88xx smart speaker amplifier firmware
Discovery Timeline
- 2026-06-01 - CVE-2025-59611 published to NVD
- 2026-06-02 - Last updated in NVD database
- June 2026 - Qualcomm releases security patch in monthly bulletin
Technical Details for CVE-2025-59611
Vulnerability Analysis
The vulnerability resides in Qualcomm diagnostic service handlers across firmware for Snapdragon compute platforms, FastConnect connectivity solutions, and WCD/WSA audio codecs. Diagnostic services accept command and data buffers from privileged userspace components for telemetry, debugging, and field-engineering operations. The affected service does not validate the size, type, or bounds of attacker-supplied input before writing it into an internal buffer. This results in an out-of-bounds write classified as [CWE-787].
Because exploitation requires local access and high privileges, the attacker must already operate inside a privileged process or possess elevated capabilities on the device. Once triggered, the write primitive corrupts adjacent memory in the diagnostic service context, which typically operates with elevated trust on the platform. The impact extends across confidentiality, integrity, and availability of the affected subsystem.
Root Cause
The root cause is missing input validation on parameters passed into diagnostic service routines. Length, offset, or structure fields supplied by the caller are used directly in memory operations without sanity checks. This allows a crafted request to write outside the bounds of the destination buffer.
Attack Vector
The attack vector is local. An authenticated attacker with high privileges sends a malformed diagnostic command to the vulnerable service, supplying parameters that drive an out-of-bounds write. User interaction is not required. The vulnerability cannot be triggered remotely over a network.
No public proof-of-concept code is currently available for CVE-2025-59611. Refer to the Qualcomm Security Bulletin June 2026 for vendor technical details.
Detection Methods for CVE-2025-59611
Indicators of Compromise
- Unexpected crashes, kernel panics, or reboots of subsystems tied to diagnostic services on Snapdragon-based devices.
- Anomalous diagnostic command traffic originating from non-administrative or unsigned userspace processes.
- Firmware integrity reports indicating unexpected modifications to diagnostic service binaries or configuration.
Detection Strategies
- Audit which processes hold privileges to call Qualcomm diagnostic services and flag any unexpected callers.
- Monitor crash logs and dmesg output for repeated faults inside diagnostic service handlers, which can indicate exploitation attempts.
- Verify firmware build versions against the fixed releases listed in the June 2026 Qualcomm bulletin during routine fleet inventory scans.
Monitoring Recommendations
- Centralize device firmware and crash telemetry into a SIEM or data lake to correlate diagnostic service faults across the fleet.
- Alert on privilege escalation events on mobile and Windows-on-Snapdragon endpoints, since local high privilege is a prerequisite for exploitation.
- Track patch deployment status for Qualcomm firmware components alongside operating system updates.
How to Mitigate CVE-2025-59611
Immediate Actions Required
- Apply the firmware updates referenced in the Qualcomm Security Bulletin June 2026 as soon as OEM-distributed builds are available.
- Inventory devices using affected Snapdragon, FastConnect, WCD, and WSA components and prioritize patch rollout for endpoints exposed to multi-user or developer access.
- Restrict local administrative and developer access to reduce the population of accounts that can reach diagnostic services.
Patch Information
Qualcomm addressed CVE-2025-59611 in the June 2026 security bulletin. Device manufacturers must integrate the updated firmware into their OEM update packages. End users should install the security update once it is distributed by their device vendor or carrier. Confirm patched firmware versions by checking the security patch level reported by the device and cross-referencing it against the Qualcomm bulletin.
Workarounds
- Disable or restrict access to diagnostic interfaces and developer modes on production devices where they are not required.
- Enforce least-privilege policies so that only signed, vendor-approved processes can invoke Qualcomm diagnostic services.
- Apply mobile device management (MDM) policies that block side-loaded applications and developer tooling on endpoints that handle sensitive data.
# Verify current Qualcomm security patch level on Android-based devices
adb shell getprop ro.build.version.security_patch
# Inventory installed firmware components for fleet patch tracking
adb shell dumpsys package | grep -i qualcomm
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
