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This vulnerability is a Use-After-Free (UAF) flaw within a specific Huawei USB driver kernel module. UAF occurs when a program continues to use a pointer to a memory location after it has been freed or deallocated. In this driver, improper handling of USB device disconnection events or specific asynchronous operations creates a race condition. The driver likely fails to properly manage internal data structures, freeing a buffer containing critical object metadata while a separate execution thread still holds a reference to it. When the system later accesses this dangling pointer, it reads from or writes to memory that may have been reallocated for a different purpose. This corrupts kernel memory and can lead to a system crash (Denial-of-Service) or, with careful manipulation, allow an attacker to leak sensitive kernel data or potentially execute arbitrary code. Exploitation requires local access, high privileges, and a complex race condition, making it difficult but dangerous if achieved, compromising both system availability and confidentiality.
Platform: Huawei Devices
Version: Multiple Kernel Versions
Vulnerability : Use-After-Free
Severity: Medium
date: 2025-11-27
Prediction: Q1 2026 Patch
What Undercode Say:
Check loaded kernel modules lsmod | grep -i usb Monitor kernel messages for USB errors dmesg | tail -50 | grep -E "(usb|error|fail)" Sample conceptual trigger code snippet echo "Triggering disconnection race..." > /dev/vulnerable_usb_node & rmmod vulnerable_usb_driver
How Exploit:
- Acquire local system access.
- Elevate privileges to module interaction level.
- Trigger USB device disconnection race condition.
- Craft payload to corrupt freed memory.
- Achieve denial-of-service or data leak.
Protection from this CVE
- Apply Huawei kernel patch.
- Restrict privileged user access.
- Disable unnecessary kernel modules.
Impact:
- Local Denial-of-Service.
- Potential information disclosure.
- Kernel memory corruption.
🎯Let’s Practice Exploiting & Learn Patching For Free:
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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