CVE-2025-58343
📋 TL;DR
This vulnerability in Samsung Exynos Wi-Fi drivers allows attackers to trigger unbounded memory allocation through a /proc filesystem operation, potentially causing kernel memory exhaustion and system instability. It affects Samsung mobile and wearable devices using specific Exynos 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 denial of service through kernel memory exhaustion, potentially requiring device reboot.
Likely Case
Device instability, performance degradation, or temporary unresponsiveness due to memory pressure.
If Mitigated
Minimal impact with proper access controls preventing unauthorized /proc access.
🎯 Exploit Status
Requires ability to write to /proc filesystem with large buffer, typically needing local system access and some privileges.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Samsung security updates for specific device models
Vendor Advisory: https://semiconductor.samsung.com/support/quality-support/product-security-updates/cve-2025-58343/
Restart Required: Yes
Instructions:
1. Check for security updates in device settings. 2. Apply available Samsung security patches. 3. Reboot device after update installation.
🔧 Temporary Workarounds
Restrict /proc access
linuxLimit access to /proc/driver/unifi0 directory to prevent unauthorized writes
chmod 600 /proc/driver/unifi0/create_tspec
chown root:root /proc/driver/unifi0/create_tspec
🧯 If You Can't Patch
- Implement strict application sandboxing to prevent unauthorized /proc access
- Monitor system memory usage and /proc access patterns for anomalies
🔍 How to Verify
Check if Vulnerable:
Check if /proc/driver/unifi0/create_tspec exists and is writable by non-privileged usersCheck Version:
Check device settings > About phone > Software information for security patch levelVerify Fix Applied:
Verify security patch level includes CVE-2025-58343 fix in device security settings📡 Detection & Monitoring
Log Indicators:
- Kernel OOM (Out of Memory) events
- Abnormal memory allocation patterns
- Access to /proc/driver/unifi0/create_tspec
Network Indicators:
- None - local vulnerability only
SIEM Query:
Process monitoring for writes to /proc/driver/unifi0/create_tspec with large buffer sizes