CVE-2025-54644
📋 TL;DR
This CVE describes an out-of-bounds array access vulnerability in the kernel ambient light module due to insufficient data verification. Successful exploitation could allow unauthorized access to sensitive information, affecting service confidentiality. This primarily impacts Huawei devices with vulnerable kernel versions.
💻 Affected Systems
- Huawei devices with vulnerable kernel ambient light module
📦 What is this software?
Emui by Huawei
Emui by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
An attacker could read kernel memory beyond the intended array bounds, potentially accessing sensitive kernel data or system information that should remain confidential.
Likely Case
Information disclosure of kernel memory contents, which could reveal system state information or aid in further exploitation.
If Mitigated
With proper access controls and kernel hardening, impact is limited to information disclosure without privilege escalation.
🎯 Exploit Status
Requires local access and kernel-level exploitation knowledge. No public exploit code available.
🛠️ 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: No
Instructions:
1. Check Huawei security advisory for affected device models. 2. Apply the latest security update from Huawei. 3. Verify kernel version after update.
🔧 Temporary Workarounds
Disable ambient light module
Android/LinuxRemove or disable the vulnerable kernel module if not required
rmmod [ambient_light_module_name]
🧯 If You Can't Patch
- Restrict local user access to minimize attack surface
- Implement kernel hardening measures like SELinux/AppArmor to limit module access
🔍 How to Verify
Check if Vulnerable:
Check kernel version and compare with Huawei security advisory for affected versionsCheck Version:
uname -rVerify Fix Applied:
Verify kernel version matches patched version in Huawei advisory📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Out-of-bounds memory access warnings in kernel logs
Network Indicators:
- None - this is a local vulnerability
SIEM Query:
source="kernel" AND ("out of bounds" OR "array access" OR "ambient light")