CVE-2024-49915
📋 TL;DR
This CVE describes a null pointer dereference vulnerability in the AMD display driver within the Linux kernel. If exploited, it could cause a kernel panic or system crash, affecting systems running vulnerable Linux kernel versions with AMD graphics hardware. The vulnerability requires local access to trigger.
💻 Affected Systems
- Linux kernel with AMD GPU drivers
📦 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 system instability.
Likely Case
System crash or kernel panic when the vulnerable code path is triggered, resulting in temporary denial of service.
If Mitigated
No impact if the null check prevents the dereference, or if the vulnerable code path isn't triggered.
🎯 Exploit Status
Requires local access and specific conditions to trigger the null pointer dereference. No known public exploits.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Linux kernel versions containing commit 0d94d9cbd9fec7344d230c4f7b781826f7799c60 or later
Vendor Advisory: https://git.kernel.org/stable/c/0d94d9cbd9fec7344d230c4f7b781826f7799c60
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version. 2. Reboot system. 3. Verify kernel version contains the fix commit.
🔧 Temporary Workarounds
Disable AMD GPU driver module
linuxPrevent loading of the vulnerable AMD display driver module
echo 'blacklist amdgpu' >> /etc/modprobe.d/blacklist.conf
update-initramfs -u
reboot
🧯 If You Can't Patch
- Restrict local user access to systems with vulnerable kernels
- Monitor system logs for kernel panic or crash events related to display drivers
🔍 How to Verify
Check if Vulnerable:
Check if system has AMD GPU and vulnerable kernel version: lspci | grep -i amd && uname -rCheck Version:
uname -rVerify Fix Applied:
Verify kernel version includes fix commit: git log --oneline | grep '0d94d9cbd9fec7344d230c4f7b781826f7799c60'📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- NULL pointer dereference errors in dmesg
- System crash logs related to display drivers
Network Indicators:
- None - local vulnerability only
SIEM Query:
source="kernel" AND ("NULL pointer dereference" OR "kernel panic" OR "dcn32_init_hw")🔗 References
- https://git.kernel.org/stable/c/0d94d9cbd9fec7344d230c4f7b781826f7799c60
- https://git.kernel.org/stable/c/7d1854c86d02cea8f8a0c0ca05f4ab14292baf3d
- https://git.kernel.org/stable/c/c395fd47d1565bd67671f45cca281b3acc2c31ef
- https://git.kernel.org/stable/c/ec1be3c527b4a5fc85bcc1b0be7cec08bf60c796
- https://git.kernel.org/stable/c/f0454b3cb0584a6bf275aeb49be61a760fd546a2
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
