CVE-2025-54643
📋 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
⚠️ Risk & Real-World Impact
Worst Case
An attacker could read kernel memory beyond the intended array bounds, potentially accessing sensitive system information or credentials stored in adjacent memory regions.
Likely Case
Information disclosure of kernel memory contents, which could reveal system state information or facilitate further attacks.
If Mitigated
Limited information disclosure with proper kernel hardening and memory protection mechanisms in place.
🎯 Exploit Status
Requires local access and kernel-level execution capabilities; no public exploit code known 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: No
Instructions:
1. Check Huawei security advisory for affected device models and versions. 2. Apply the latest security update from Huawei. 3. Verify the patch has been applied successfully.
🔧 Temporary Workarounds
Disable ambient light module
Android/LinuxTemporarily disable the vulnerable kernel module if not essential for device operation
echo 'blacklist ambient_light_module' >> /etc/modprobe.d/blacklist.conf
rmmod ambient_light_module
🧯 If You Can't Patch
- Implement strict access controls to limit local user privileges
- Enable kernel hardening features like KASLR and memory protection
🔍 How to Verify
Check if Vulnerable:
Check kernel version and module loading status: 'lsmod | grep ambient_light' and compare with Huawei advisoryCheck Version:
uname -rVerify Fix Applied:
Verify kernel version is updated beyond vulnerable range specified in Huawei advisory📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Out-of-bounds memory access warnings in kernel logs
- Unexpected ambient light module activity
Network Indicators:
- None - this is a local vulnerability
SIEM Query:
source="kernel" AND ("out of bounds" OR "array access" OR "ambient light")