CVE-2024-26913
📋 TL;DR
This CVE describes a vulnerability in the Linux kernel's AMD display driver where missing ODM (Output Data Mux) calculations during pipe split policy determination can cause underflow or corruption issues. This affects systems using AMD graphics hardware with the vulnerable driver, potentially leading to display artifacts or system instability. 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
System crash, kernel panic, or persistent display corruption requiring hardware reset
Likely Case
Display artifacts, temporary system instability, or application crashes when using high-resolution displays (8K@30Hz)
If Mitigated
Minor display glitches or no visible impact if system isn't using affected display configurations
🎯 Exploit Status
Exploitation requires local access and specific display configuration conditions
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Linux kernel with commit cdbe0be8874c63bca85b8c38e5b1eecbdd18df31 or faf51b201bc42adf500945732abb6220c707d6f3
Vendor Advisory: https://git.kernel.org/stable/c/cdbe0be8874c63bca85b8c38e5b1eecbdd18df31
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version from distribution vendor. 2. Reboot system to load new kernel. 3. Verify AMD display driver is updated.
🔧 Temporary Workarounds
Avoid 8K@30Hz display configuration
linuxUse lower resolution or different refresh rate to avoid triggering the vulnerable code path
Set display resolution to 4K or lower
Use 60Hz refresh rate if 8K is required
🧯 If You Can't Patch
- Restrict local access to systems with vulnerable configurations
- Implement strict user privilege controls to limit who can modify display settings
🔍 How to Verify
Check if Vulnerable:
Check kernel version and if AMD graphics with dcn35 display engine is in use with 8K@30Hz configurationCheck Version:
uname -r && grep -i 'drm/amd/display' /proc/versionVerify Fix Applied:
Verify kernel includes commit cdbe0be8874c63bca85b8c38e5b1eecbdd18df31 and test 8K@30Hz display functionality📡 Detection & Monitoring
Log Indicators:
- Kernel logs showing display underflow errors
- AMD GPU driver crash messages
- Xorg/Wayland display server errors
Network Indicators:
- None - local vulnerability only
SIEM Query:
source="kernel" AND ("underflow" OR "display corruption" OR "amd" AND "gpu")