CVE-2022-49365
📋 TL;DR
This is an off-by-one buffer overflow vulnerability in the AMD GPU driver for Linux kernels. It allows local attackers to potentially crash the system or execute arbitrary code with kernel privileges. Systems using AMD graphics cards with affected Linux kernel versions are vulnerable.
💻 Affected Systems
- Linux kernel with AMD GPU driver (amdgpu)
📦 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
Local privilege escalation to kernel-level code execution, allowing complete system compromise.
Likely Case
Kernel panic leading to system crash and denial of service.
If Mitigated
System crash requiring reboot, but no privilege escalation due to additional security controls.
🎯 Exploit Status
Requires local access and knowledge of kernel exploitation techniques. The vulnerability is in a specific interrupt handler function.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Linux kernel with commits 607c5cd1a08e, a35faec3db0e, b0808b7a0415, or ec9ec3bc08b1
Vendor Advisory: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=607c5cd1a08e196d9f2bd3b25a8083ed27ad7ceb
Restart Required: Yes
Instructions:
1. Update Linux kernel to version containing the fix. 2. For distributions: Use package manager (apt/yum/dnf) to update kernel. 3. Reboot system to load new kernel.
🔧 Temporary Workarounds
Disable AMD GPU driver
linuxTemporarily disable the vulnerable amdgpu kernel module
sudo modprobe -r amdgpu
echo 'blacklist amdgpu' | sudo tee /etc/modprobe.d/blacklist-amdgpu.conf
🧯 If You Can't Patch
- Restrict local user access to systems with AMD GPUs
- Implement strict privilege separation and limit sudo/root access
🔍 How to Verify
Check if Vulnerable:
Check kernel version and if amdgpu module is loaded: uname -r && lsmod | grep amdgpuCheck Version:
uname -rVerify Fix Applied:
Verify kernel version is updated and contains the fix commit: uname -r && zgrep -i '607c5cd1a08e\|a35faec3db0e\|b0808b7a0415\|ec9ec3bc08b1' /proc/config.gz 2>/dev/null || echo 'Check distribution kernel changelog'📡 Detection & Monitoring
Log Indicators:
- Kernel oops messages in /var/log/kern.log or dmesg
- System crashes or reboots
Network Indicators:
- None - local vulnerability only
SIEM Query:
source="kernel" AND ("Oops" OR "general protection fault" OR "kernel panic") AND process="dm_dmub_outbox1_low_irq"