CVE-2025-54651
📋 TL;DR
A race condition vulnerability exists in the kernel hufs module that could allow local attackers to potentially access sensitive information. This affects systems running vulnerable Huawei kernel versions with the hufs module loaded. The vulnerability impacts confidentiality but not integrity or availability.
💻 Affected Systems
- Huawei devices with hufs kernel module
📦 What is this software?
Harmonyos by Huawei
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Local attacker gains unauthorized access to sensitive kernel memory or process data, potentially exposing credentials, encryption keys, or other protected information.
Likely Case
Information disclosure of limited kernel memory contents to local users, potentially revealing system state or configuration details.
If Mitigated
Minimal impact with proper access controls and SELinux/AppArmor policies restricting local user privileges.
🎯 Exploit Status
Race conditions require precise timing and local access. No public exploit code known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Huawei security bulletin for specific patched kernel versions
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2025/8/
Restart Required: Yes
Instructions:
1. Check Huawei security advisory for affected versions. 2. Apply kernel update from Huawei official repositories. 3. Reboot system to load patched kernel.
🔧 Temporary Workarounds
Disable hufs module
allUnload the vulnerable kernel module if not required for system functionality
rmmod hufs
echo 'blacklist hufs' >> /etc/modprobe.d/blacklist.conf
Restrict local user privileges
allImplement strict access controls and privilege separation
🧯 If You Can't Patch
- Implement strict SELinux/AppArmor policies to restrict local user capabilities
- Monitor for suspicious local privilege escalation attempts and kernel module activity
🔍 How to Verify
Check if Vulnerable:
Check if hufs module is loaded: lsmod | grep hufsCheck Version:
uname -rVerify Fix Applied:
Verify kernel version matches patched version from Huawei advisory: uname -r📡 Detection & Monitoring
Log Indicators:
- Kernel oops messages
- Failed privilege escalation attempts
- Suspicious module loading
Network Indicators:
- None - local-only vulnerability
SIEM Query:
source="kernel" AND ("hufs" OR "race condition" OR "general protection fault")