CVE-2024-56775
📋 TL;DR
A memory management vulnerability in the AMD display driver component of the Linux kernel could lead to memory leaks or double-free conditions when handling plane reference counts. This affects Linux systems with AMD graphics hardware using the affected kernel versions. The vulnerability requires local access to exploit.
💻 Affected Systems
- Linux kernel with AMD display driver (drm/amd/display)
📦 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 →⚠️ Risk & Real-World Impact
Worst Case
Kernel panic, system crash, or potential privilege escalation through memory corruption leading to arbitrary code execution in kernel context.
Likely Case
System instability, crashes, or denial of service affecting graphical applications and display functionality.
If Mitigated
Limited impact to graphical performance or application crashes without privilege escalation.
🎯 Exploit Status
Exploitation requires local access and specific conditions to trigger the refcount handling issue. No public exploits known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel versions containing commits 27227a234c1487cb7a684615f0749c455218833a and 8cb2f6793845f135b28361ba8e96901cae3e5790
Vendor Advisory: https://git.kernel.org/stable/c/27227a234c1487cb7a684615f0749c455218833a
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version from your distribution's repositories. 2. Reboot system to load new kernel. 3. Verify kernel version after reboot.
🔧 Temporary Workarounds
Disable AMD display driver
linuxTemporarily disable the affected AMD display driver module
sudo modprobe -r amdgpu
sudo modprobe -r amd_drm
🧯 If You Can't Patch
- Restrict local user access to systems with AMD graphics hardware
- Monitor system logs for kernel panic or memory corruption events
🔍 How to Verify
Check if Vulnerable:
Check if your kernel version includes the vulnerable code by examining kernel source or checking distribution security advisoriesCheck Version:
uname -rVerify Fix Applied:
Verify kernel version includes the fix commits or check with 'uname -r' after patching📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- Memory corruption warnings in dmesg
- AMD display driver crash logs
Network Indicators:
- None - local vulnerability only
SIEM Query:
source="kernel" AND ("panic" OR "Oops" OR "BUG") AND ("drm" OR "amd" OR "display")