CVE-2023-52908
📋 TL;DR
This CVE describes a NULL pointer dereference vulnerability in the AMD GPU driver within the Linux kernel. If exploited, it could cause a kernel panic or system crash, affecting systems with AMD graphics hardware running vulnerable Linux kernel versions. The vulnerability occurs when debug information is printed while a resource manager pointer is NULL.
💻 Affected Systems
- Linux kernel with AMD GPU driver (drm/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
Kernel panic leading to system crash and denial of service, potentially causing data loss or service disruption.
Likely Case
System crash or kernel panic when specific debug conditions are triggered, resulting in temporary denial of service.
If Mitigated
Minimal impact if debug features are disabled or the system is properly patched.
🎯 Exploit Status
Requires local access and ability to trigger specific debug conditions in the AMD GPU driver.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel versions containing commits 0be7ed8e7eb15282b5d0f6fdfea884db594ea9bf and f2faf0699af78968a27ca154bf76e94247f8c471
Vendor Advisory: https://git.kernel.org/stable/c/0be7ed8e7eb15282b5d0f6fdfea884db594ea9bf
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version. 2. Reboot system. 3. Verify kernel version after reboot.
🔧 Temporary Workarounds
Disable debug features
linuxDisable AMD GPU driver debug features to prevent triggering the NULL dereference
echo 0 > /sys/module/amdgpu/parameters/debug
🧯 If You Can't Patch
- Restrict local access to prevent users from triggering debug conditions
- Monitor system logs for kernel panic events related to AMD GPU driver
🔍 How to Verify
Check if Vulnerable:
Check kernel version and verify if it contains the vulnerable AMD GPU driver codeCheck Version:
uname -rVerify Fix Applied:
Verify kernel version includes the fix commits or is newer than patched versions📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- AMD GPU driver crash logs
- System crash dumps
Network Indicators:
- None - local vulnerability only
SIEM Query:
source="kernel" AND ("panic" OR "Oops" OR "NULL pointer dereference") AND "amdgpu"