CVE-2025-52515: Samsung Exynos Processor DoS Vulnerability

CVE-2025-52515 Overview

A race condition vulnerability has been discovered in the Camera subsystem of Samsung Mobile and Wearable Processor Exynos chipsets. The vulnerability exists within the issimian device driver, where improper synchronization between concurrent operations results in an out-of-bounds memory access. This flaw can be exploited by a local attacker to cause a denial of service condition on affected devices.

Critical Impact

Local attackers can exploit the race condition in the issimian camera driver to trigger out-of-bounds memory access, resulting in denial of service on Samsung devices powered by vulnerable Exynos processors.

Affected Products

• Samsung Mobile Processor Exynos 1330
• Samsung Mobile Processor Exynos 1380
• Samsung Mobile Processor Exynos 1480
• Samsung Mobile Processor Exynos 2400
• Samsung Mobile Processor Exynos 1580
• Samsung Mobile Processor Exynos 2500
• Samsung Wearable Processor Exynos (applicable models)

Discovery Timeline

• 2026-01-05 - CVE-2025-52515 published to NVD
• 2026-01-08 - Last updated in NVD database

Technical Details for CVE-2025-52515

Vulnerability Analysis

This vulnerability is classified under CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization), commonly known as a Race Condition. The flaw resides in the issimian device driver, which is part of the camera subsystem in Samsung Exynos processors.

The vulnerability requires local access to exploit, as the attack vector is limited to local system interaction. While the attack complexity is high due to the timing-sensitive nature of race conditions, no special privileges are required to trigger the vulnerability. When successfully exploited, the race condition leads to an out-of-bounds memory access that impacts system availability.

Root Cause

The root cause stems from improper synchronization mechanisms within the issimian device driver. When multiple threads or processes concurrently access shared resources in the camera driver without adequate locking or synchronization primitives, a Time-of-Check Time-of-Use (TOCTOU) condition can occur. This allows the state of a resource to change between when it is checked and when it is used, leading to out-of-bounds memory operations.

Race conditions in device drivers are particularly dangerous as they operate at kernel level, and memory corruption at this level can destabilize the entire system.

Attack Vector

The attack requires local access to the target device. An attacker would need to craft specific timing conditions to win the race between concurrent operations in the issimian camera driver. The attack scenario involves:

1. Initiating camera-related operations that trigger the vulnerable code path in the issimian driver
2. Creating concurrent access patterns that exploit the lack of proper synchronization
3. Winning the race condition to cause the driver to access memory outside its intended bounds

Due to the high attack complexity, successful exploitation requires precise timing and potentially multiple attempts to trigger the race condition reliably.

The vulnerability mechanism involves concurrent thread execution in the camera driver without proper mutex protection. When two or more threads attempt to access or modify shared memory structures simultaneously, the lack of synchronization can cause one thread to operate on stale or invalid memory references. For detailed technical information, refer to the Samsung CVE-2025-52515 Details advisory.

Detection Methods for CVE-2025-52515

Indicators of Compromise

• Unexpected camera application crashes or system reboots
• Kernel panic logs referencing the issimian driver or camera subsystem
• Memory access violation errors in kernel logs related to camera operations
• Abnormal system behavior when multiple camera-intensive applications are running

Detection Strategies

• Monitor kernel logs for out-of-bounds access errors associated with camera drivers
• Implement system stability monitoring to detect unusual crash patterns in camera-related processes
• Deploy endpoint detection solutions capable of identifying kernel-level anomalies
• Audit device driver behavior for signs of race condition exploitation attempts

Monitoring Recommendations

• Enable verbose kernel logging for camera subsystem events on development or test devices
• Implement crash reporting and analysis to correlate camera driver failures
• Monitor system availability metrics for unexplained service interruptions
• Review firmware and driver version information against Samsung security advisories

How to Mitigate CVE-2025-52515

Immediate Actions Required

• Check Samsung security advisories for firmware updates addressing CVE-2025-52515
• Apply the latest security patches from Samsung for affected Exynos processor devices
• Restrict physical access to devices running vulnerable firmware versions
• Monitor affected devices for signs of exploitation attempts

Patch Information

Samsung has published security information regarding this vulnerability. Organizations and users should consult the Samsung Product Security Updates page and the specific CVE-2025-52515 advisory for detailed patch information and firmware update availability for their specific device models.

Device manufacturers using affected Exynos processors should integrate Samsung's security patches into their firmware update cycles and distribute updates to end users.

Workarounds

• Limit camera application usage on devices where patches cannot be immediately applied
• Avoid running multiple camera-intensive applications simultaneously on vulnerable devices
• Consider temporarily disabling camera functionality on high-security devices until patches are available
• Implement application-level controls to restrict concurrent camera access where possible

# Check device firmware version (Android)
# Settings > About Phone > Software Information
# Or via ADB:
adb shell getprop ro.build.version.security_patch
# Verify the security patch level includes fixes for CVE-2025-52515
# Consult Samsung advisory for specific patch dates