CVE-2024-56652
📋 TL;DR
This CVE describes a use-after-free vulnerability in the Linux kernel's Xe graphics driver register save/restore functionality. When the kernel reallocates memory for the register pool, existing pointers become invalid, leading to potential memory corruption. This affects systems running vulnerable Linux kernel versions with Intel Xe graphics driver enabled.
💻 Affected Systems
- Linux kernel with Intel Xe graphics driver (xe)
📦 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, system crash, or potential local privilege escalation to root via memory corruption leading to arbitrary code execution in kernel context.
Likely Case
System instability, kernel crashes, or denial of service when graphics operations trigger the vulnerable code path.
If Mitigated
Limited impact if system doesn't use Xe graphics driver or has proper kernel hardening features enabled.
🎯 Exploit Status
Exploitation requires local access and triggering the specific code path in the Xe graphics driver. The KASAN report indicates memory corruption is detectable.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel versions containing commit e5283bd4dfecbd3335f43b62a68e24dae23f59e4 or later
Vendor Advisory: https://git.kernel.org/stable/c/b0193a31a0ca5a0f9e60bb4a86537d46b98111b8
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version. 2. For distributions: Use package manager (apt/yum/dnf) to update kernel package. 3. Reboot system to load new kernel.
🔧 Temporary Workarounds
Disable Xe graphics driver
linuxPrevent loading of the vulnerable xe driver module
echo 'blacklist xe' >> /etc/modprobe.d/blacklist.conf
rmmod xe
Use alternative graphics driver
linuxSwitch to i915 or other graphics driver if hardware supports it
modprobe -r xe
modprobe i915
🧯 If You Can't Patch
- Restrict local user access to systems with Xe graphics hardware
- Implement kernel hardening features like KASAN to detect exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check if xe module is loaded: lsmod | grep xe. Check kernel version against patched versions.Check Version:
uname -rVerify Fix Applied:
Verify kernel version is updated and xe module loads without errors in dmesg.📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- KASAN reports mentioning xe_reg_sr_apply_mmio
- Use-after-free errors in dmesg
Network Indicators:
- None - local vulnerability only
SIEM Query:
source="kernel" AND ("KASAN" OR "use-after-free" OR "xe_reg_sr")