CVE-2025-26784
📋 TL;DR
A memory corruption vulnerability in Samsung Exynos processors allows attackers to write data beyond allocated buffer boundaries due to missing length validation. This affects Samsung mobile devices, wearables, and modems using the listed Exynos chips. Successful exploitation could lead to arbitrary code execution or system crashes.
💻 Affected Systems
- Samsung Mobile Processor
- Wearable Processor
- Modem Exynos 980
- Exynos 990
- Exynos 850
- Exynos 1080
- Exynos 2100
- Exynos 1280
- Exynos 2200
- Exynos 1330
- Exynos 1380
- Exynos 1480
- Exynos 2400
- Exynos W920
- Exynos W930
- Exynos W1000
- Modem 5123
- Modem 5300
- Modem 5400
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full device compromise allowing remote code execution, data theft, or persistent backdoor installation.
Likely Case
Local privilege escalation, denial of service, or application crashes affecting device stability.
If Mitigated
Limited impact with proper memory protections and exploit mitigations in place.
🎯 Exploit Status
Requires local access or ability to execute code on device. No public exploit code available at disclosure.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Device-specific security updates from Samsung
Vendor Advisory: https://semiconductor.samsung.com/support/quality-support/product-security-updates/cve-2025-26784/
Restart Required: Yes
Instructions:
1. Check for device security updates in Settings > Software Update. 2. Install available updates. 3. Reboot device after installation.
🔧 Temporary Workarounds
Disable Unknown Sources
androidPrevent installation of untrusted applications that could exploit this vulnerability.
Settings > Security > Install unknown apps > Disable for all apps
Enable Google Play Protect
androidUse built-in malware scanning to detect potentially malicious apps.
Settings > Security > Google Play Protect > Scan device for security threats
🧯 If You Can't Patch
- Restrict physical access to vulnerable devices
- Implement application allowlisting to prevent unauthorized app execution
🔍 How to Verify
Check if Vulnerable:
Check device model and processor in Settings > About phone > Model number and Hardware infoCheck Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level in Settings > About phone > Software information > Android security patch level📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Unexpected process crashes
- Memory access violation errors
Network Indicators:
- Unusual outbound connections from system processes
- Suspicious inter-process communication
SIEM Query:
Process: (crash OR panic) AND DeviceModel: (Exynos*)