CVE-2022-50179
📋 TL;DR
This is a use-after-free vulnerability in the Linux kernel's ath9k wireless driver that allows attackers to potentially execute arbitrary code or cause system crashes. It affects Linux systems using Atheros-based wireless hardware with the ath9k driver. The vulnerability occurs when the driver fails to properly initialize memory pointers during device setup.
💻 Affected Systems
- Linux kernel with ath9k wireless 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 leading to full system compromise, privilege escalation to kernel level, or persistent backdoor installation.
Likely Case
Kernel panic leading to system crash/reboot, denial of service, or system instability.
If Mitigated
Limited impact if exploit fails or system has kernel hardening protections like KASLR/SMAP.
🎯 Exploit Status
Exploitation requires sending specially crafted packets to the wireless interface. No public exploit code has been reported.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Linux kernel versions containing commits 03ca957c5f7b55660957eda20b5db4110319ac7a or later
Vendor Advisory: https://git.kernel.org/stable/c/03ca957c5f7b55660957eda20b5db4110319ac7a
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version from your distribution's repositories. 2. For custom kernels, apply the fix commits from kernel.org. 3. Reboot system to load new kernel.
🔧 Temporary Workarounds
Disable ath9k driver
linuxBlacklist or disable the vulnerable ath9k driver module
echo 'blacklist ath9k' >> /etc/modprobe.d/blacklist-ath9k.conf
rmmod ath9k
Disable wireless interface
linuxTurn off the affected wireless interface
ip link set wlan0 down
🧯 If You Can't Patch
- Disable wireless functionality and use wired networking only
- Implement network segmentation to isolate wireless networks from critical systems
🔍 How to Verify
Check if Vulnerable:
Check kernel version and if ath9k module is loaded: uname -r && lsmod | grep ath9kCheck Version:
uname -rVerify Fix Applied:
Verify kernel version is patched and check for crash logs: dmesg | grep -i 'ath9k\|panic\|oops'📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- OOPs messages related to ath9k
- System crash/reboot logs
Network Indicators:
- Unusual wireless packet patterns targeting Atheros devices
SIEM Query:
source="kernel" AND ("ath9k" OR "use-after-free" OR "kernel panic")🔗 References
- https://git.kernel.org/stable/c/03ca957c5f7b55660957eda20b5db4110319ac7a
- https://git.kernel.org/stable/c/0ac4827f78c7ffe8eef074bc010e7e34bc22f533
- https://git.kernel.org/stable/c/62bc1ea5c7401d77eaf73d0c6a15f3d2e742856e
- https://git.kernel.org/stable/c/6b14ab47937ba441e75e8dbb9fbfc9c55efa41c6
- https://git.kernel.org/stable/c/ab7a0ddf5f1cdec63cb21840369873806fc36d80
- https://git.kernel.org/stable/c/b66ebac40f64336ae2d053883bee85261060bd27
- https://git.kernel.org/stable/c/e9e21206b8ea62220b486310c61277e7ebfe7cec
- https://git.kernel.org/stable/c/eccd7c3e2596b574241a7670b5b53f5322f470e5
