CVE-2025-27048: Qualcomm Xg101039 Buffer Overflow Flaw

CVE-2025-27048 Overview

CVE-2025-27048 is a memory corruption vulnerability in the Qualcomm camera platform driver. The flaw is triggered while the driver processes Input/Output Control (IOCTL) calls from user space. A local attacker with low privileges can send crafted IOCTL requests to corrupt kernel memory, resulting in loss of confidentiality, integrity, and availability on affected devices. The issue is tracked under [CWE-822: Untrusted Pointer Dereference] and was disclosed in the Qualcomm October 2025 Security Bulletin. The vulnerability affects a broad set of Qualcomm chipsets and firmware, including FastConnect 7800, FastConnect 6900, SC8380XP, and multiple WCD and WSA audio codec platforms.

Critical Impact
Successful exploitation allows local privilege escalation and kernel-level code execution on affected Qualcomm-based devices through the camera driver interface.

Affected Products

Qualcomm FastConnect 7800 and FastConnect 6900 firmware
Qualcomm SC8380XP, QCC2072, and XG101002/XG101032/XG101039 firmware
Qualcomm WCD9378C, WCD9380, WCD9385, WSA8840, WSA8845, and WSA8845H firmware

Discovery Timeline

2025-10-09 - CVE-2025-27048 published to NVD
2025-10 - Qualcomm publishes October 2025 Security Bulletin addressing the issue
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-27048

Vulnerability Analysis

The vulnerability resides in the camera platform driver shipped in Qualcomm firmware. The driver exposes an IOCTL interface that user-space processes use to configure and interact with the camera subsystem. During processing of specific IOCTL commands, the driver dereferences a pointer supplied or influenced by user space without sufficient validation. This behavior maps to CWE-822 (Untrusted Pointer Dereference) and produces memory corruption in kernel context.

An attacker with local code execution and access to the camera device node can craft IOCTL payloads that force the driver to write to or read from attacker-controlled kernel addresses. This primitive can be developed into privilege escalation or kernel-mode arbitrary code execution.

Root Cause

The root cause is missing or insufficient validation of pointer values passed through IOCTL structures into the camera platform driver. When the driver operates on these untrusted pointers, kernel memory can be corrupted, adjacent structures overwritten, or invalid regions accessed, leading to instability and exploitable conditions.

Attack Vector

Exploitation requires local access with low privileges. An unprivileged process, or a compromised application holding permission to open the camera device, can issue malicious IOCTL calls. No user interaction is required. The vulnerability manifests entirely on the local device; remote exploitation is not applicable. See the Qualcomm Security Bulletin October 2025 for vendor-provided technical context.

// No public proof-of-concept is available.
// The vulnerability is triggered by crafted IOCTL requests
// to the camera platform driver device node, causing the
// kernel driver to dereference an untrusted pointer during
// IOCTL parameter processing.

Detection Methods for CVE-2025-27048

Indicators of Compromise

Unexpected kernel panics, camera subsystem crashes, or reboots referencing the camera platform driver in device logs.
Non-camera or unprivileged processes opening the camera driver device node and issuing atypical IOCTL command codes.
Kernel log entries showing invalid memory access, page faults, or slab corruption originating from camera driver call stacks.

Detection Strategies

Collect and inspect dmesg and logcat output on Qualcomm-based Android devices for driver-level faults tied to camera IOCTLs.
Monitor mobile endpoint telemetry for privilege escalation attempts and abnormal process behavior following camera API usage.
Correlate anomalous kernel crash reports across a fleet to identify targeted exploitation attempts against the driver.

Monitoring Recommendations

Enable vendor crash reporting and forward kernel diagnostic data to a central logging pipeline for analysis.
Track installed firmware and security patch level (SPL) across managed devices to identify hosts still exposed to CVE-2025-27048.
Alert on repeated abnormal terminations of camera-related services, which may indicate exploitation attempts against the IOCTL interface.

How to Mitigate CVE-2025-27048

Immediate Actions Required

Apply the firmware updates referenced in the Qualcomm Security Bulletin October 2025 as soon as the OEM makes them available.
Inventory devices using affected Qualcomm chipsets (FastConnect 7800/6900, SC8380XP, WCD/WSA series, XG101xxx, X2000xxx) and prioritize patch deployment.
Restrict installation of untrusted applications that could obtain camera permissions on unpatched devices.

Patch Information

Qualcomm has released fixes as part of the October 2025 Security Bulletin. Device OEMs incorporate these patches into their own monthly security patch levels. Administrators should verify the SPL on managed endpoints reflects the October 2025 update or later before considering a device remediated.

Workarounds

Where patches are not yet available from the OEM, limit camera permissions to trusted, first-party applications only.
Deploy mobile device management (MDM) policies that block sideloading and enforce application vetting on affected fleets.
Isolate high-value users from unmanaged or end-of-life Qualcomm devices until vendor firmware updates are installed.

bash

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

# Confirm the SoC/firmware family for inventory purposes
adb shell getprop ro.hardware
adb shell getprop ro.board.platform