CVE-2025-58342
📋 TL;DR
This vulnerability in Samsung Exynos Wi-Fi drivers allows attackers to cause kernel memory exhaustion through unbounded memory allocation. Attackers can trigger a denial-of-service condition by writing large buffers to a specific /proc filesystem interface. This affects Samsung mobile and wearable devices using the listed 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 freeze requiring hard reboot, potentially causing data loss and service disruption on affected devices.
Likely Case
Device instability, application crashes, and degraded performance due to kernel memory exhaustion.
If Mitigated
Limited impact with proper access controls preventing unauthorized /proc access.
🎯 Exploit Status
Exploitation requires write access to /proc interface, which typically requires elevated privileges or compromised applications.
🛠️ 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-2025-58342/
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/uapsd interface to prevent unauthorized writes
chmod 600 /proc/driver/unifi0/uapsd
chown root:root /proc/driver/unifi0/uapsd
🧯 If You Can't Patch
- Restrict shell access and app permissions to prevent unauthorized /proc access
- Monitor system logs for unusual /proc write operations
🔍 How to Verify
Check if Vulnerable:
Check if /proc/driver/unifi0/uapsd exists and is writable by non-root usersCheck Version:
getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level includes CVE-2025-58342 fix via device security settings📡 Detection & Monitoring
Log Indicators:
- Large write operations to /proc/driver/unifi0/uapsd
- Kernel OOM (Out of Memory) events
- System instability logs
Network Indicators:
- None - local exploitation only
SIEM Query:
proc_access AND path:"/proc/driver/unifi0/uapsd" AND size:>1000000