CVE-2025-54634
📋 TL;DR
This vulnerability involves improper handling of abnormal conditions during huge page separation in memory management. Successful exploitation could cause system crashes or denial of service, affecting systems running vulnerable Huawei software versions. The vulnerability primarily impacts availability rather than confidentiality or integrity.
💻 Affected Systems
- Huawei products with affected memory management implementations
📦 What is this software?
Harmonyos by Huawei
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Complete system crash or kernel panic leading to sustained denial of service, requiring physical or remote reboot to restore functionality.
Likely Case
System instability, application crashes, or temporary denial of service affecting specific processes or services.
If Mitigated
Minor performance degradation or isolated process failures with proper memory management controls in place.
🎯 Exploit Status
Exploitation requires local access and ability to trigger abnormal huge page separation conditions; no public exploit code available at this time
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Huawei security bulletin for specific patched versions
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2025/8/
Restart Required: Yes
Instructions:
1. Check Huawei security advisory for affected products and versions. 2. Apply recommended security updates from Huawei. 3. Reboot system after patch installation. 4. Verify patch application through version checks.
🔧 Temporary Workarounds
Disable huge pages
linuxTemporarily disable huge page support to mitigate vulnerability
echo never > /sys/kernel/mm/transparent_hugepage/enabled
echo never > /sys/kernel/mm/transparent_hugepage/defrag
Limit user access
linuxRestrict non-privileged user access to memory management operations
chmod 750 /proc/sys/vm/*
setfacl -m u:user:r-- /proc/sys/vm/hugepages
🧯 If You Can't Patch
- Implement strict access controls to limit who can execute memory-intensive operations
- Monitor system logs for memory management errors and huge page allocation failures
🔍 How to Verify
Check if Vulnerable:
Check system version against Huawei's affected version list in security advisoryCheck Version:
uname -r (for kernel version); check product-specific version commands per Huawei documentationVerify Fix Applied:
Verify kernel version after patch installation and check that huge page operations complete without errors📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- Memory allocation failures in system logs
- Huge page separation errors in dmesg
Network Indicators:
- Sudden service unavailability without network cause
- Increased system resource monitoring alerts
SIEM Query:
source="kernel" AND ("panic" OR "Oops" OR "hugepage" OR "memory allocation failed")