CVE-2025-26785
📋 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 compromise.
💻 Affected Systems
- Samsung Mobile Processor
- Samsung Wearable Processor
- Samsung 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, persistent backdoor installation, or device bricking.
Likely Case
Local privilege escalation allowing attackers to gain elevated system privileges from a lower-privileged context.
If Mitigated
Denial of service or application crash if exploit attempts are blocked by security controls.
🎯 Exploit Status
Exploitation requires local access or ability to execute code on the device. No public exploit code is currently available.
🛠️ 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-2025-26785/
Restart Required: Yes
Instructions:
1. Check for device security updates in Settings > Software Update. 2. Install available updates. 3. For enterprise devices, deploy updates through MDM solutions. 4. Contact Samsung for embedded device patch information.
🔧 Temporary Workarounds
Restrict local code execution
allLimit ability to run untrusted code on affected devices
Application sandboxing
allEnsure apps run with minimal necessary privileges
🧯 If You Can't Patch
- Isolate affected devices from critical networks and sensitive data
- Implement strict application allowlisting and disable unnecessary services
🔍 How to Verify
Check if Vulnerable:
Check device model and processor information in Settings > About Phone > Hardware InformationCheck Version:
adb shell getprop ro.build.fingerprint (for Android devices)Verify Fix Applied:
Verify security patch level in Settings > About Phone > Software Information and ensure it's after the vulnerability disclosure date📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Memory access violation errors
- Unexpected process crashes in system services
Network Indicators:
- Unusual outbound connections from system processes
- Suspicious local network traffic patterns
SIEM Query:
Process: (crash OR panic) AND DeviceModel: (Exynos*) OR EventID: 1000/1001 (Windows) with memory access violation