CVE-2025-47327: Qualcomm Aqt1000 Use-After-Free Vulnerability

CVE-2025-47327 Overview

CVE-2025-47327 is a memory corruption vulnerability affecting a broad range of Qualcomm chipset firmware components. The flaw occurs during image data encoding operations and is classified as a Use After Free issue [CWE-416]. An attacker with local, low-privileged access can trigger the condition to corrupt memory in the affected firmware component. Successful exploitation impacts confidentiality, integrity, and availability on the targeted device. Qualcomm addressed the issue in the September 2025 security bulletin.

Critical Impact
Local attackers with low privileges can trigger memory corruption during image encoding, potentially leading to arbitrary code execution or denial of service on affected Qualcomm firmware.

Affected Products

Qualcomm FastConnect 6200, 6700, 6800, 6900, and 7800 firmware
Qualcomm Snapdragon 7c+ Gen 3, 8c, 8cx, and 8cx Gen 2/3 Compute Platforms
Qualcomm QCA6391/6420/6430, QCM5430/6490, QCS5430/6490, WCD934x/937x/938x, and WSA88xx audio and connectivity firmware

Discovery Timeline

2025-09-24 - CVE-2025-47327 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-47327

Vulnerability Analysis

The vulnerability resides in the image data encoding path within Qualcomm firmware. During encoding, a memory object is freed while a reference to it remains reachable. Subsequent use of that dangling reference produces a Use After Free condition [CWE-416], corrupting memory managed by the firmware. This class of flaw commonly leads to arbitrary code execution when an attacker controls the reallocated memory contents.

Because the attack vector is local, exploitation requires code execution on the device or access to an interface that reaches the vulnerable encoder. Low privileges are sufficient, and no user interaction is required. The impacted components span connectivity, audio codec, and compute platform firmware, which are integrated across mobile, IoT, and compute product lines.

Root Cause

The root cause is improper lifetime management of a memory buffer used during image data encoding. The firmware releases the buffer while another code path retains a pointer to it. When that stale pointer is dereferenced, the operation reads or writes memory that may have been reallocated for a different purpose. Attackers can shape the reallocated region to influence subsequent execution flow.

Attack Vector

An attacker requires local access to the device and low-privilege execution to interact with the affected firmware component. By invoking the image encoding functionality with attacker-influenced state, the flaw can be triggered. See the Qualcomm Security Bulletin September 2025 for vendor technical details.

No verified proof-of-concept code is publicly available for CVE-2025-47327.
Refer to the Qualcomm September 2025 Security Bulletin for vendor guidance.

Detection Methods for CVE-2025-47327

Indicators of Compromise

Unexpected crashes, resets, or watchdog resets on Snapdragon compute, FastConnect, or WCD/WSA audio subsystems during multimedia or camera operations
Kernel or firmware logs showing faults in image encoder code paths or associated driver modules
Anomalous local processes invoking multimedia encoding APIs from low-privileged contexts

Detection Strategies

Monitor endpoint telemetry for repeated crashes tied to media encoding services on devices using affected Qualcomm firmware
Correlate low-privileged process activity with access to camera, codec, and encoding interfaces
Track firmware and patch level inventory to identify devices running pre-September 2025 baselines

Monitoring Recommendations

Ingest device crash reports and kernel logs into a centralized analytics pipeline for pattern analysis
Alert on abnormal invocation frequency of multimedia encoding syscalls from non-media applications
Maintain an up-to-date asset inventory that includes Qualcomm chipset models and firmware revisions

How to Mitigate CVE-2025-47327

Immediate Actions Required

Apply the vendor patch delivered through the Qualcomm September 2025 security bulletin as soon as it is available from the device OEM
Identify all devices in the fleet that use the affected Qualcomm chipsets and prioritize their update path
Restrict local access on affected devices and enforce least privilege for applications that interact with multimedia interfaces

Patch Information

Qualcomm released fixes as part of the September 2025 security bulletin. Device OEMs must incorporate the updated firmware into their software updates for end users. Refer to the Qualcomm Security Bulletin September 2025 for the authoritative patch listing and affected version details.

Workarounds

Limit installation of untrusted third-party applications that can interact with device multimedia and encoding APIs
Disable or restrict access to image encoding features where operationally feasible until patches are deployed
Enforce application sandboxing and strict permission models to reduce local attack surface

bash

# Verify Android security patch level on affected devices
adb shell getprop ro.build.version.security_patch

# Confirm the device is running the September 2025 or later patch level
# Expected output: 2025-09-01 or later