CVE-2025-21458
📋 TL;DR
This vulnerability allows attackers to cause memory corruption by simultaneously calling IOCTL interface functions to map and unmap buffers. It affects systems using Qualcomm hardware with vulnerable drivers, potentially leading to privilege escalation or denial of service.
💻 Affected Systems
- Qualcomm hardware with vulnerable IOCTL drivers
📦 What is this software?
Snapdragon 888 5g Mobile Platform Firmware by Qualcomm
View all CVEs affecting Snapdragon 888 5g Mobile Platform Firmware →
⚠️ Risk & Real-World Impact
Worst Case
Local privilege escalation to kernel-level access, allowing full system compromise and persistence.
Likely Case
System crash or denial of service through kernel panic or instability.
If Mitigated
Limited to denial of service if proper isolation and privilege separation are implemented.
🎯 Exploit Status
Exploitation requires local access and precise timing of simultaneous IOCTL calls
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Qualcomm August 2025 security bulletin for specific firmware/driver versions
Vendor Advisory: https://docs.qualcomm.com/product/publicresources/securitybulletin/august-2025-bulletin.html
Restart Required: Yes
Instructions:
1. Review Qualcomm August 2025 security bulletin. 2. Identify affected chipset/driver versions. 3. Apply firmware/driver updates from device manufacturer. 4. Reboot system after update.
🔧 Temporary Workarounds
Restrict IOCTL access
linuxLimit access to vulnerable IOCTL interfaces using kernel module blacklisting or access controls
echo 'blacklist vulnerable_driver_module' >> /etc/modprobe.d/blacklist.conf
rmmod vulnerable_driver_module
🧯 If You Can't Patch
- Implement strict privilege separation to limit user access to IOCTL interfaces
- Monitor for abnormal IOCTL call patterns and system crashes
🔍 How to Verify
Check if Vulnerable:
Check system for Qualcomm driver versions listed in the August 2025 security bulletinCheck Version:
dmesg | grep -i qualcomm OR check device manufacturer firmware versionVerify Fix Applied:
Verify driver/firmware version matches patched versions from Qualcomm bulletin📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- IOCTL call errors in system logs
- Driver crash messages
Network Indicators:
- None - local exploitation only
SIEM Query:
source="kernel" AND ("panic" OR "IOCTL" OR "Qualcomm driver")