CVE-2024-49865
📋 TL;DR
A use-after-free vulnerability in the Linux kernel's Direct Rendering Manager (DRM) Xe driver allows local attackers to trigger memory corruption. This vulnerability affects systems running vulnerable Linux kernel versions with the Xe graphics driver enabled. Attackers can potentially escalate privileges or cause system crashes.
💻 Affected Systems
- Linux kernel with Xe graphics driver
📦 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
Local privilege escalation to root, kernel panic leading to denial of service, or arbitrary code execution in kernel context.
Likely Case
Local privilege escalation allowing attackers to gain root access on affected systems.
If Mitigated
Limited to denial of service if proper kernel hardening and privilege separation are in place.
🎯 Exploit Status
Requires local access and ability to make ioctl calls. The vulnerability description suggests exploitation involves timing attacks to guess VM IDs.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Linux kernel with commit dcfd3971327f3ee92765154baebbaece833d3ca9 or later
Vendor Advisory: https://git.kernel.org/stable/c/09cf8901fc0225898311b375cfcc67bae37ed5da
Restart Required: Yes
Instructions:
1. Update Linux kernel to version containing fix commit dcfd3971327f3ee92765154baebbaece833d3ca9. 2. Reboot system to load patched kernel.
🔧 Temporary Workarounds
Disable Xe graphics driver
linuxPrevent loading of the vulnerable Xe graphics driver module
echo 'blacklist xe' >> /etc/modprobe.d/blacklist.conf
rmmod xe
🧯 If You Can't Patch
- Restrict local user access to systems with vulnerable kernels
- Implement strict privilege separation and limit user access to ioctl system calls
🔍 How to Verify
Check if Vulnerable:
Check if Xe driver is loaded: lsmod | grep xe. Check kernel version against patched versions.Check Version:
uname -rVerify Fix Applied:
Verify kernel version includes fix commit: grep -q 'dcfd3971327f3ee92765154baebbaece833d3ca9' /proc/version_signature || uname -r📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- OOM killer activity related to Xe driver
- Failed ioctl calls to Xe driver
SIEM Query:
process.name: "uname" AND command_line: "-r" OR kernel.panic: "*xe*"