CVE-2025-58348
📋 TL;DR
This vulnerability in Samsung Exynos Wi-Fi drivers allows attackers to cause kernel memory exhaustion through unbounded memory allocation. Attackers can trigger this by writing a large buffer to a specific /proc filesystem path, potentially leading to denial-of-service conditions. 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 reboot due to kernel memory exhaustion, potentially requiring physical device restart and causing service disruption.
Likely Case
Device instability, application crashes, or temporary denial-of-service until memory is freed or system restarts.
If Mitigated
Minimal impact with proper access controls preventing unauthorized write access to /proc/driver/unifi0/confg_tspec.
🎯 Exploit Status
Exploitation requires local access and ability to write to /proc filesystem. No authentication bypass needed if attacker already has appropriate permissions.
🛠️ 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-2025-58348
Restart Required: Yes
Instructions:
1. Check for security updates in device settings. 2. Apply available Samsung security patches. 3. Reboot device after update installation. 4. Verify patch installation through device security settings.
🔧 Temporary Workarounds
Restrict /proc filesystem access
linuxLimit write access to /proc/driver/unifi0/confg_tspec to prevent exploitation
chmod 440 /proc/driver/unifi0/confg_tspec
chown root:root /proc/driver/unifi0/confg_tspec
🧯 If You Can't Patch
- Implement strict access controls to prevent unauthorized write access to /proc filesystem
- Monitor system memory usage and logs for abnormal allocation patterns
🔍 How to Verify
Check if Vulnerable:
Check if /proc/driver/unifi0/confg_tspec exists and is writable by non-root usersCheck Version:
getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level in device settings matches or exceeds patch containing CVE-2025-58348 fix📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Out of memory errors in dmesg
- Abnormal memory allocation patterns
Network Indicators:
- None - local exploitation only
SIEM Query:
source="kernel" AND ("out of memory" OR "panic" OR "OOM") AND process="unifi"