CVE-2024-46726
📋 TL;DR
This CVE addresses integer overflow and array index overrun vulnerabilities in the AMD display driver within the Linux kernel. Attackers could potentially cause kernel crashes or execute arbitrary code by triggering these overflow conditions. 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 →⚠️ Risk & Real-World Impact
Worst Case
Kernel panic leading to denial of service, or potential arbitrary code execution with kernel privileges resulting in complete system compromise.
Likely Case
Kernel crash or system instability requiring reboot, potentially causing data loss or service disruption.
If Mitigated
Limited impact due to kernel hardening features like KASLR and SMEP/SMAP, likely resulting in crash rather than code execution.
🎯 Exploit Status
Exploitation requires local access and ability to trigger specific display driver operations. No public exploits known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Linux kernel with commits 3dc6bb57dab36b38b7374af0ac916174c146b6ed, 733ae185502d30bbe79575167b6178cfb6c5d6bd, 8e2734bf444767fed787305ccdcb36a2be5301a2, or d705b5869f6b1b46ad5ceb1bd2a08c04f7e5003b
Vendor Advisory: https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
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
linuxPrevent loading of vulnerable AMD display driver module
echo 'blacklist amdgpu' >> /etc/modprobe.d/blacklist-amd.conf
update-initramfs -u
reboot
🧯 If You Can't Patch
- Restrict local user access to systems with AMD graphics hardware
- Implement strict privilege separation and limit users who can access display-related operations
🔍 How to Verify
Check if Vulnerable:
Check kernel version and if AMD display driver is loaded: uname -r && lsmod | grep amdgpuCheck Version:
uname -rVerify Fix Applied:
Verify kernel version is patched and check for presence of fix commits in kernel source📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- AMDGPU driver crash logs in dmesg
- System crash/reboot events
Network Indicators:
- None - local vulnerability only
SIEM Query:
EventID=41 OR Source='kernel' AND Message LIKE '%panic%' OR Message LIKE '%amdgpu%' AND Message LIKE '%error%'🔗 References
- https://git.kernel.org/stable/c/3dc6bb57dab36b38b7374af0ac916174c146b6ed
- https://git.kernel.org/stable/c/733ae185502d30bbe79575167b6178cfb6c5d6bd
- https://git.kernel.org/stable/c/8e2734bf444767fed787305ccdcb36a2be5301a2
- https://git.kernel.org/stable/c/d705b5869f6b1b46ad5ceb1bd2a08c04f7e5003b
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
