CVE-2024-26699
📋 TL;DR
This CVE-2024-26699 is an array index out-of-bounds vulnerability in the AMD display driver (drm/amd/display) in the Linux kernel. It allows potential memory access violations when iterating through clock management arrays, which could lead to kernel crashes or privilege escalation. Systems running affected Linux kernel versions with AMD graphics hardware are vulnerable.
💻 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 →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 →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, or potential privilege escalation to kernel mode allowing full system compromise.
Likely Case
System instability, crashes, or denial of service when the vulnerable display driver code path is triggered.
If Mitigated
Limited impact with proper kernel hardening and isolation, though crashes may still occur.
🎯 Exploit Status
Exploitation requires triggering the specific vulnerable code path in the display driver, which may require specific graphics operations or conditions.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patches available in Linux kernel stable branches (commits: 46806e59a87790760870d216f54951a5b4d545bc, ca400d8e0c1c9d79c08dfb6b7f966e26c8cae7fb)
Vendor Advisory: https://git.kernel.org/stable/c/46806e59a87790760870d216f54951a5b4d545bc
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version from distribution repositories. 2. Reboot system to load new kernel. 3. Verify kernel version after reboot.
🔧 Temporary Workarounds
Disable AMD display driver module
linuxPrevent loading of the vulnerable drm/amd/display module (not recommended for systems requiring AMD graphics)
echo 'blacklist amdgpu' >> /etc/modprobe.d/blacklist.conf
update-initramfs -u
reboot
🧯 If You Can't Patch
- Restrict local user access and implement strict application control
- Implement kernel hardening measures like SELinux/AppArmor to limit impact
🔍 How to Verify
Check if Vulnerable:
Check kernel version and whether AMD display driver is loaded: 'lsmod | grep amdgpu' and 'uname -r'Check Version:
uname -rVerify Fix Applied:
Verify kernel version is updated to one containing the fix commits, and system remains stable during graphics operations📡 Detection & Monitoring
Log Indicators:
- Kernel oops messages in /var/log/kern.log or dmesg
- System crashes during display/graphics operations
Network Indicators:
- None - this is a local vulnerability
SIEM Query:
source="kernel" AND ("Oops" OR "general protection fault" OR "kernel panic") AND process="amdgpu"