CVE-2025-39952
📋 TL;DR
This CVE describes a buffer overflow vulnerability in the wilc1000 WiFi driver in the Linux kernel. An attacker could exploit this to execute arbitrary code or cause denial of service on systems using this driver. The vulnerability affects Linux systems with the wilc1000 wireless driver loaded.
💻 Affected Systems
- Linux kernel with wilc1000 driver
📦 What is this software?
Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with kernel privileges leading to complete system compromise.
Likely Case
Kernel panic or system crash causing denial of service.
If Mitigated
No impact if the driver is not loaded or the system is patched.
🎯 Exploit Status
Exploitation requires sending specially crafted WiFi frames to trigger the buffer overflow. No public exploit code is known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Linux kernel with commits 2203ef417044b10a8563ade6a17c74183745d72e or later
Vendor Advisory: https://git.kernel.org/stable/c/2203ef417044b10a8563ade6a17c74183745d72e
Restart Required: Yes
Instructions:
1. Update Linux kernel to version containing the fix. 2. Check your distribution's security advisories. 3. Reboot the system to load the patched kernel.
🔧 Temporary Workarounds
Disable wilc1000 driver
linuxPrevent loading of the vulnerable driver module
echo 'blacklist wilc1000' >> /etc/modprobe.d/blacklist-wilc1000.conf
rmmod wilc1000
Disable WiFi interface
linuxTurn off the vulnerable WiFi interface
ip link set wlan0 down
🧯 If You Can't Patch
- Disable WiFi functionality on affected systems
- Implement network segmentation to isolate WiFi networks from critical systems
🔍 How to Verify
Check if Vulnerable:
Check if wilc1000 module is loaded: lsmod | grep wilc1000Check Version:
uname -rVerify Fix Applied:
Check kernel version contains fix commit: grep -q '2203ef417044b10a8563ade6a17c74183745d72e' /proc/version || echo 'Check kernel changelog'📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- System crash dumps
- WiFi driver error messages
Network Indicators:
- Unusual WiFi frame patterns
- Malformed management frames
SIEM Query:
source="kernel" AND ("panic" OR "Oops" OR "wilc1000")