CVE-2025-53966
📋 TL;DR
A buffer overflow vulnerability in Samsung Exynos mobile processors allows attackers to execute arbitrary code or cause denial of service by sending specially crafted IOCTL messages. This affects devices using Exynos 1380, 1480, 2400, and 1580 chipsets. The vulnerability requires local access to the device.
💻 Affected Systems
- Samsung Galaxy smartphones/tablets with Exynos 1380
- Samsung Galaxy smartphones/tablets with Exynos 1480
- Samsung Galaxy smartphones/tablets with Exynos 2400
- Samsung Galaxy smartphones/tablets with Exynos 1580
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full device compromise with kernel-level code execution, allowing complete control over the affected device, data theft, and persistence.
Likely Case
Local privilege escalation from a lower-privileged user or app to kernel-level access, potentially leading to data compromise or device instability.
If Mitigated
Denial of service (device crash/reboot) if exploit fails or is detected by security controls.
🎯 Exploit Status
Exploitation requires local access and knowledge of kernel internals; buffer overflow in NL80211 vendor command handling.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Samsung's monthly security updates for specific patch versions (e.g., May 2025 security patch or later)
Vendor Advisory: https://semiconductor.samsung.com/support/quality-support/product-security-updates/cve-2025-53966/
Restart Required: Yes
Instructions:
1. Check for device updates in Settings > Software update. 2. Install the latest security patch from Samsung. 3. Reboot the device after installation.
🔧 Temporary Workarounds
Restrict local access
allLimit physical access to devices and avoid installing untrusted apps to reduce attack surface.
🧯 If You Can't Patch
- Isolate affected devices from sensitive networks and data.
- Monitor for unusual device behavior or crashes that might indicate exploitation attempts.
🔍 How to Verify
Check if Vulnerable:
Check device security patch level in Settings > About phone > Software information. If before the patch addressing CVE-2025-53966, device is vulnerable.Check Version:
On Android: adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Confirm security patch level is dated after the fix release (e.g., May 2025 or later).📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Unexpected reboots
- Suspicious IOCTL calls in kernel logs
Network Indicators:
- Not network-exploitable; focus on device logs
SIEM Query:
Not applicable for network SIEM; monitor device logs for kernel errors or crashes.