CVE-2025-58347
📋 TL;DR
This vulnerability allows attackers to cause kernel memory exhaustion through unbounded memory allocation in the Wi-Fi driver of affected Samsung Exynos processors. Attackers can trigger this by writing a large buffer to /proc/driver/unifi0/p2p_certif, potentially leading to denial of service. This affects devices using Samsung Exynos 980, 850, 1080, 1280, 1330, 1380, 1480, 1580, W920, W930 and W1000 processors.
💻 Affected Systems
- Samsung Mobile Processor Exynos 980
- Samsung Mobile Processor Exynos 850
- Samsung Mobile Processor Exynos 1080
- Samsung Mobile Processor Exynos 1280
- Samsung Mobile Processor Exynos 1330
- Samsung Mobile Processor Exynos 1380
- Samsung Mobile Processor Exynos 1480
- Samsung Mobile Processor Exynos 1580
- Samsung Wearable Processor Exynos W920
- Samsung Wearable Processor Exynos W930
- Samsung Wearable Processor Exynos W1000
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system crash or freeze due to kernel memory exhaustion, requiring hard reboot and potentially causing data loss or corruption.
Likely Case
Device becomes unresponsive or experiences performance degradation until reboot, disrupting normal operations.
If Mitigated
Limited impact with proper access controls preventing unauthorized write operations to the vulnerable interface.
🎯 Exploit Status
Exploitation requires write access to /proc/driver/unifi0/p2p_certif, which typically requires local access or privilege escalation. The vulnerability is straightforward to trigger once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Samsung security updates for specific device/OS versions
Vendor Advisory: https://semiconductor.samsung.com/support/quality-support/product-security-updates/cve-2025-58347/
Restart Required: Yes
Instructions:
1. Check for available security updates from device manufacturer
2. Apply the latest firmware/OS update
3. Reboot device after update installation
4. Verify the patch is applied by checking system version
🔧 Temporary Workarounds
Restrict access to vulnerable interface
linuxChange permissions on /proc/driver/unifi0/p2p_certif to prevent write operations
chmod 444 /proc/driver/unifi0/p2p_certif
Disable Wi-Fi when not needed
allTurn off Wi-Fi functionality to prevent driver loading
🧯 If You Can't Patch
- Implement strict access controls to prevent unauthorized users from accessing device interfaces
- Monitor system for abnormal memory usage patterns and investigate any spikes
🔍 How to Verify
Check if Vulnerable:
Check if /proc/driver/unifi0/p2p_certif exists and is writable: ls -la /proc/driver/unifi0/p2p_certifCheck Version:
Check device firmware/OS version in system settings or run: getprop ro.build.fingerprint (Android)Verify Fix Applied:
Verify the file permissions are read-only or the interface no longer exists after patch application📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Out of memory errors in dmesg
- Abnormal memory usage patterns
Network Indicators:
- Device becoming unresponsive to network requests
- Wi-Fi connectivity issues
SIEM Query:
Process monitoring for write operations to /proc/driver/unifi0/p2p_certif OR kernel logs containing 'out of memory' or 'panic'