CVE-2022-50325
📋 TL;DR
This CVE describes a buffer overflow vulnerability in the Linux kernel's ASoC Intel AVS driver. An attacker could exploit this to cause memory corruption or potentially execute arbitrary code with kernel privileges. Systems running affected Linux kernel versions with Intel audio hardware are vulnerable.
💻 Affected Systems
- Linux kernel
📦 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 →⚠️ Risk & Real-World Impact
Worst Case
Kernel privilege escalation leading to full system compromise, data theft, or persistent backdoor installation.
Likely Case
System crash or denial of service due to memory corruption, requiring reboot to restore functionality.
If Mitigated
No impact if patched or if the vulnerable driver isn't loaded/used.
🎯 Exploit Status
Requires local access and ability to trigger specific audio driver operations. No public exploits known at time of disclosure.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel versions containing commits 0bad12fee5ae16ab439d97c66c4238f5f4cc7f68, 23ae34e033b2c0e5e88237af82b163b296fd6aa9, or ec1f0c12cb2e614c3fa8e9402f7ffcf82166078a
Vendor Advisory: https://git.kernel.org/stable/c/0bad12fee5ae16ab439d97c66c4238f5f4cc7f68
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version from your distribution vendor. 2. Reboot system to load new kernel. 3. Verify kernel version after reboot.
🔧 Temporary Workarounds
Disable Intel AVS driver
linuxPrevent loading of vulnerable driver module
echo 'blacklist snd-intel-avs' >> /etc/modprobe.d/blacklist.conf
rmmod snd-intel-avs
🧯 If You Can't Patch
- Restrict local user access to systems with vulnerable kernels
- Implement strict privilege separation and limit users who can access audio devices
🔍 How to Verify
Check if Vulnerable:
Check kernel version and if snd-intel-avs module is loaded: lsmod | grep snd-intel-avsCheck Version:
uname -rVerify Fix Applied:
Verify kernel version is patched and driver still functions for audio operations📡 Detection & Monitoring
Log Indicators:
- Kernel oops messages
- System crashes related to audio driver
- dmesg errors mentioning snd-intel-avs or memory corruption
Network Indicators:
- None - local vulnerability only
SIEM Query:
Search for kernel panic events or module loading failures related to audio drivers