CVE-2025-47339 Overview
CVE-2025-47339 is a Use After Free (CWE-416) memory corruption vulnerability that occurs during the deinitialization of an HDCP (High-bandwidth Digital Content Protection) session. This vulnerability affects Qualcomm components and can allow a local attacker with low privileges to achieve code execution, potentially leading to complete system compromise.
Critical Impact
Successful exploitation could allow attackers to gain elevated privileges, execute arbitrary code, or cause system instability by corrupting memory during HDCP session cleanup operations.
Affected Products
- Qualcomm chipsets and components (refer to Qualcomm January 2026 Security Bulletin for complete list)
- Devices utilizing HDCP functionality with vulnerable Qualcomm components
- Android devices with affected Qualcomm firmware
Discovery Timeline
- 2026-01-07 - CVE-2025-47339 published to NVD
- 2026-01-08 - Last updated in NVD database
Technical Details for CVE-2025-47339
Vulnerability Analysis
This vulnerability is classified as a Use After Free (CWE-416) memory corruption issue that manifests during the HDCP session deinitialization process. HDCP is a form of digital copy protection developed to prevent copying of digital audio and video content as it travels across connections.
The flaw occurs when memory associated with an HDCP session is freed but subsequently referenced during the cleanup process. This creates a condition where the program attempts to access memory that has already been deallocated, leading to undefined behavior. An attacker who can control the contents of the freed memory region could potentially redirect execution flow or corrupt critical data structures.
The vulnerability requires local access and low privileges to exploit, meaning an attacker would need to have already gained some level of access to the target device. However, no user interaction is required for exploitation, making it suitable for inclusion in privilege escalation attack chains.
Root Cause
The root cause is improper memory lifecycle management in the HDCP session handling code. When an HDCP session is being torn down, the deinitialization routine fails to properly track memory object references before freeing them. This results in dangling pointers that can be dereferenced after the underlying memory has been released, triggering the Use After Free condition.
Attack Vector
The attack vector is local, requiring the attacker to have code execution capability on the target device. Exploitation would typically involve:
- Triggering the HDCP session deinitialization process
- Racing to reallocate the freed memory with attacker-controlled content
- Causing the vulnerable code to dereference the now-corrupted memory region
- Leveraging the memory corruption to achieve code execution or privilege escalation
The vulnerability is particularly concerning in mobile device contexts where HDCP is commonly used for secure video streaming. An attacker who has compromised an application could potentially leverage this vulnerability to escalate privileges and gain deeper access to the system.
Detection Methods for CVE-2025-47339
Indicators of Compromise
- Unexpected system crashes or kernel panics during video playback or streaming sessions
- Anomalous memory access patterns in HDCP-related driver components
- Evidence of heap spray techniques targeting HDCP session memory regions
- Suspicious processes attempting to trigger rapid HDCP session creation and destruction
Detection Strategies
- Monitor for unusual patterns of HDCP session initialization and deinitialization events
- Implement memory integrity checking for driver-level components
- Deploy endpoint detection solutions capable of identifying use-after-free exploitation patterns
- Enable kernel memory debugging features to detect dangling pointer access
Monitoring Recommendations
- Enable verbose logging for display and content protection subsystems
- Monitor for signs of privilege escalation following multimedia operations
- Track firmware and driver versions across device fleet to identify vulnerable systems
- Implement crash dump analysis to detect exploitation attempts
How to Mitigate CVE-2025-47339
Immediate Actions Required
- Review the Qualcomm January 2026 Security Bulletin to determine if your devices are affected
- Apply vendor-provided firmware and driver updates as soon as they become available
- Prioritize patching for devices that handle sensitive content or have elevated access to protected resources
- Implement defense-in-depth measures including ASLR and memory protection features
Patch Information
Qualcomm has addressed this vulnerability in their January 2026 Security Bulletin. Affected device manufacturers should incorporate the updated components into their firmware builds. End users should apply security updates provided by their device manufacturers or carriers as they become available.
For detailed patch information and affected chipset lists, consult the Qualcomm January 2026 Security Bulletin.
Workarounds
- Limit exposure by restricting local access to affected systems where possible
- Implement application sandboxing to contain potential exploitation attempts
- Monitor system logs for signs of exploitation while awaiting patches
- Consider disabling HDCP functionality temporarily on high-risk systems if operationally feasible
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
