CVE-2023-52981
📋 TL;DR
This vulnerability in the Linux kernel's Intel i915 graphics driver involves improper reference counting of request objects during error capture and debugfs operations. It could lead to memory corruption or system instability when using GuC submission mode. Systems running affected Linux kernel versions with Intel integrated or discrete graphics are potentially affected.
💻 Affected Systems
- Linux kernel with Intel i915 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 →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, system crash, or potential privilege escalation through memory corruption leading to arbitrary code execution in kernel context.
Likely Case
System instability, crashes, or denial of service when error capture or debugfs operations are triggered on systems with GuC submission enabled.
If Mitigated
No impact if patched or if GuC submission is not used.
🎯 Exploit Status
Exploitation requires triggering specific error capture or debugfs operations in the graphics driver, which may require local access or specific application behavior.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel versions containing commit 3700e353781e27f1bc7222f51f2cc36cbeb9b4ec or its backports
Vendor Advisory: https://git.kernel.org/stable/c/86d8ddc74124c3fdfc139f246ba6da15e45e86e3
Restart Required: Yes
Instructions:
1. Update to a patched kernel version from your distribution vendor. 2. Reboot the system to load the new kernel. 3. Verify the fix is applied by checking kernel version.
🔧 Temporary Workarounds
Disable GuC submission
linuxDisable GuC submission mode which triggers the vulnerable code path
echo 0 > /sys/module/i915/parameters/enable_guc
Add i915.enable_guc=0 to kernel boot parameters
🧯 If You Can't Patch
- Disable GuC submission via kernel parameters or sysfs
- Restrict access to debugfs and limit user privileges to reduce attack surface
🔍 How to Verify
Check if Vulnerable:
Check if running an affected kernel version and if GuC submission is enabled: cat /sys/module/i915/parameters/enable_gucCheck Version:
uname -rVerify Fix Applied:
Verify kernel version is updated to one containing the fix commit and test error capture/debugfs operations📡 Detection & Monitoring
Log Indicators:
- Kernel oops messages related to i915 driver
- System crashes or instability when using graphics-intensive applications
Network Indicators:
- None - this is a local vulnerability
SIEM Query:
Search for kernel panic logs containing 'i915' or 'drm' references