CVE-2025-38596
📋 TL;DR
This is a use-after-free vulnerability in the Linux kernel's panthor graphics driver debugfs code. It allows attackers with local access to potentially execute arbitrary code or cause denial of service. Systems using affected Linux kernel versions with panthor driver enabled are vulnerable.
💻 Affected Systems
- Linux kernel with panthor DRM 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 →⚠️ Risk & Real-World Impact
Worst Case
Local privilege escalation to kernel-level access, allowing complete system compromise, data theft, or persistent backdoor installation.
Likely Case
Kernel panic leading to system crash/denial of service, or limited information disclosure from kernel memory.
If Mitigated
No impact if system doesn't use panthor driver or has proper access controls preventing local user exploitation.
🎯 Exploit Status
Requires local access and knowledge of kernel exploitation techniques. Use-after-free vulnerabilities in kernel drivers are commonly exploited.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Linux kernel with commits 5f2be12442db6a2904e6e31b0e3b5ad5aebf868b and fe69a391808404977b1f002a6e7447de3de7a88e applied
Vendor Advisory: https://git.kernel.org/stable/c/5f2be12442db6a2904e6e31b0e3b5ad5aebf868b
Restart Required: Yes
Instructions:
1. Update Linux kernel to version containing the fix commits. 2. Rebuild kernel if compiling from source. 3. Reboot system to load patched kernel.
🔧 Temporary Workarounds
Disable panthor driver
linuxPrevent loading of vulnerable panthor DRM driver module
echo 'blacklist panthor' >> /etc/modprobe.d/blacklist-panthor.conf
rmmod panthor
Restrict debugfs access
linuxLimit access to debugfs filesystem where vulnerability exists
mount -o remount,nodev,noexec,nosuid /sys/kernel/debug
🧯 If You Can't Patch
- Implement strict access controls to prevent local user exploitation
- Disable or remove panthor driver functionality if not required
🔍 How to Verify
Check if Vulnerable:
Check if panthor module is loaded: lsmod | grep panthor. Check kernel version against patched versions.Check Version:
uname -rVerify Fix Applied:
Verify kernel version includes fix commits: git log --oneline | grep -E '5f2be12442db6a2904e6e31b0e3b5ad5aebf868b|fe69a391808404977b1f002a6e7447de3de7a88e'📡 Detection & Monitoring
Log Indicators:
- Kernel oops/panic messages
- drm/panthor related errors in dmesg
- Unexpected process crashes with kernel access
Network Indicators:
- None - local exploitation only
SIEM Query:
Process:parent.name='kernel' AND EventID=41 OR Source='kernel' AND Message:'panthor' AND (Message:'Oops' OR Message:'general protection fault')