CVE-2025-58341
📋 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 /proc/driver/unifi0/ap_cert_disable_ht_vht, potentially leading to denial of service. 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 disrupting device functionality and availability.
Likely Case
Local denial of service causing temporary device instability or performance degradation.
If Mitigated
Minimal impact if proper access controls restrict write access to the vulnerable proc file.
🎯 Exploit Status
Exploitation requires local access and ability to write to the proc file. No privilege escalation demonstrated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Samsung security updates for specific device/processor patches
Vendor Advisory: https://semiconductor.samsung.com/support/quality-support/product-security-updates/cve-2025-58341/
Restart Required: Yes
Instructions:
1. Check for security updates from Samsung. 2. Apply available patches through device update mechanism. 3. Reboot device after update installation.
🔧 Temporary Workarounds
Restrict proc file access
linuxLimit write access to /proc/driver/unifi0/ap_cert_disable_ht_vht using SELinux or file permissions
chmod 440 /proc/driver/unifi0/ap_cert_disable_ht_vht
chown root:root /proc/driver/unifi0/ap_cert_disable_ht_vht
🧯 If You Can't Patch
- Implement strict SELinux policies to restrict access to vulnerable proc files
- Monitor for abnormal memory consumption patterns and suspicious write operations to /proc/driver/unifi0/
🔍 How to Verify
Check if Vulnerable:
Check if /proc/driver/unifi0/ap_cert_disable_ht_vht exists and is writable by non-privileged usersCheck Version:
Check device settings > About phone > Software information for security patch levelVerify Fix Applied:
Verify patch installation through device security patch level and attempt to reproduce memory exhaustion (not recommended in production)📡 Detection & Monitoring
Log Indicators:
- Kernel OOM (Out of Memory) events
- Abnormal memory allocation patterns in kernel logs
- Failed write operations to /proc/driver/unifi0/
Network Indicators:
- None - local vulnerability only
SIEM Query:
source="kernel" AND ("oom" OR "memory allocation failed" OR "/proc/driver/unifi0")