CVE-2025-52517: Samsung Exynos Processor DoS Vulnerability

CVE-2025-52517 Overview

A race condition vulnerability has been identified in the Camera subsystem of Samsung Mobile and Wearable Processor Exynos chipsets. The flaw exists within the issimian device driver where improper synchronization leads to a double free condition, resulting in a denial of service condition on affected devices.

Critical Impact

A race condition in the issimian device driver causes a double free vulnerability, potentially allowing attackers to crash affected Samsung devices running vulnerable Exynos processors.

Affected Products

• Samsung Mobile Processor Exynos 1330
• Samsung Mobile Processor Exynos 1380
• Samsung Mobile Processor Exynos 1480
• Samsung Mobile Processor Exynos 1580
• Samsung Mobile Processor Exynos 2400
• Samsung Mobile Processor Exynos 2500
• Samsung Wearable Processor Exynos (affected variants)

Discovery Timeline

• January 5, 2026 - CVE-2025-52517 published to NVD
• January 8, 2026 - Last updated in NVD database

Technical Details for CVE-2025-52517

Vulnerability Analysis

This vulnerability represents a classic race condition flaw in the issimian device driver that handles camera operations on Samsung Exynos processors. The race condition occurs when multiple threads or processes attempt to access and free the same memory resource concurrently without proper synchronization mechanisms in place.

When exploited, the double free condition can corrupt memory management structures, leading to system instability and denial of service. Double free vulnerabilities occur when a program attempts to free the same memory location twice, which can corrupt the heap allocator's internal data structures.

The affected Exynos processors span both mobile and wearable platforms, indicating the vulnerability exists in shared camera driver code across Samsung's processor lineup. The Exynos 1330, 1380, 1480, 1580, 2400, and 2500 series processors are commonly found in Samsung Galaxy smartphones and tablets, as well as wearable devices.

Root Cause

The root cause lies in the improper handling of concurrent memory operations within the issimian device driver. The driver fails to implement adequate locking mechanisms or reference counting when managing camera-related memory allocations. This allows two separate code paths to independently attempt to free the same memory allocation, triggering the double free condition.

Race conditions in device drivers are particularly dangerous as they operate in kernel space and can lead to system-wide instability. The lack of proper synchronization primitives (such as mutexes, spinlocks, or atomic operations) around critical memory management sections enables this exploitation scenario.

Attack Vector

The attack vector for this vulnerability involves triggering concurrent camera operations that exercise the vulnerable code path in the issimian driver. An attacker would need local access to the device and the ability to interact with the camera subsystem, either through a malicious application or by manipulating camera-related system calls.

The exploitation scenario typically involves:

1. Initiating camera operations that allocate memory in the issimian driver
2. Creating a race condition by rapidly performing operations that trigger memory deallocation
3. Winning the race to cause the same memory to be freed twice
4. Observing the resulting system crash or denial of service

Due to the nature of race condition vulnerabilities, successful exploitation may require multiple attempts to achieve the precise timing necessary to trigger the double free.

Detection Methods for CVE-2025-52517

Indicators of Compromise

• Unexpected device crashes or reboots when camera applications are in use
• Kernel panic logs referencing the issimian driver or camera subsystem
• Memory corruption errors in system logs related to camera operations
• Repeated system instability during concurrent camera access attempts

Detection Strategies

• Monitor system logs for kernel warnings or errors related to the camera driver and memory management
• Implement crash analytics to detect patterns of device instability associated with camera usage
• Review device firmware versions against Samsung's security update releases
• Deploy mobile device management (MDM) solutions to track device health and crash frequency

Monitoring Recommendations

• Enable verbose kernel logging on test devices to capture driver-level events
• Implement automated alerting for unusual patterns of device crashes across managed fleets
• Monitor Samsung's security bulletin page for firmware update announcements
• Track camera application behavior and resource utilization for anomalies

How to Mitigate CVE-2025-52517

Immediate Actions Required

• Apply the latest firmware updates from Samsung that address this vulnerability
• Review device inventory to identify devices with affected Exynos processors
• Prioritize updates for devices in high-security environments
• Consider restricting camera access for sensitive applications until patches are applied

Patch Information

Samsung has acknowledged this vulnerability and released security updates to address the double free condition in the issimian device driver. Detailed patch information is available through Samsung's CVE-2025-52517 Security Advisory.

Organizations should apply the latest firmware updates from Samsung to remediate this vulnerability. The fix likely implements proper synchronization mechanisms to prevent concurrent memory operations from causing the double free condition.

For the latest security updates and patch availability, refer to Samsung Product Security Updates.

Workarounds

• Limit camera access permissions for untrusted applications until firmware updates are applied
• Monitor device stability and report unusual camera-related crashes to IT administrators
• Consider temporary camera usage restrictions in high-security environments if patching is delayed
• Ensure devices are enrolled in automatic update programs to receive security patches promptly