CVE-2025-47368
📋 TL;DR
This vulnerability allows attackers to cause memory corruption by providing invalid userspace addresses to the MCDM IOCTL interface. This affects systems with Qualcomm chipsets that have the vulnerable driver loaded. Successful exploitation could lead to privilege escalation or system crashes.
💻 Affected Systems
- Qualcomm chipsets with MCDM driver
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Local privilege escalation to kernel mode, allowing complete system compromise and persistence.
Likely Case
Local denial of service through kernel panic or system crash.
If Mitigated
Limited impact if proper kernel hardening and exploit mitigations are enabled.
🎯 Exploit Status
Exploitation requires local access and knowledge of kernel memory layout. No public exploit code available as of advisory date.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Qualcomm security bulletin for specific chipset firmware versions
Vendor Advisory: https://docs.qualcomm.com/product/publicresources/securitybulletin/november-2025-bulletin.html
Restart Required: Yes
Instructions:
1. Check Qualcomm advisory for affected chipset models. 2. Contact device manufacturer for firmware updates. 3. Apply firmware update following manufacturer instructions. 4. Reboot device after update.
🔧 Temporary Workarounds
Disable vulnerable driver module
linuxUnload or blacklist the MCDM kernel module if not required
rmmod mcdm
echo 'blacklist mcdm' >> /etc/modprobe.d/blacklist.conf
Restrict IOCTL access
linuxUse SELinux/AppArmor to restrict access to the vulnerable device node
chmod 600 /dev/mcdm
setenforce 1
🧯 If You Can't Patch
- Implement strict access controls to prevent unauthorized local users from accessing the device
- Enable kernel hardening features like KASLR, stack canaries, and SMAP/SMEP
🔍 How to Verify
Check if Vulnerable:
Check if MCDM driver is loaded: lsmod | grep mcdmCheck Version:
Check kernel module version: modinfo mcdm | grep versionVerify Fix Applied:
Verify driver version after update or confirm module is not loaded📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- IOCTL errors in kernel logs
- Unexpected crashes in MCDM-related processes
Network Indicators:
- None - local vulnerability only
SIEM Query:
source="kernel" AND "mcdm" AND ("panic" OR "oops" OR "segfault")