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How CVE-2025-1121 Works
The vulnerability exists in ChromeOS version 15786.48.2’s installer and recovery image handling. An attacker with physical access can craft a malicious recovery image that bypasses signature verification during the boot process. This allows execution of arbitrary code with root privileges during device recovery mode. The flaw stems from improper validation of recovery image metadata, enabling manipulation of partition tables. Enterprise enrollment protections can be bypassed by injecting modified policy files into the recovery flow before first boot.
DailyCVE Form
Platform: ChromeOS
Version: 15786.48.2
Vulnerability: Privilege escalation
Severity: Critical
Date: 03/06/2025
Prediction: Patch by 08/15/2025
What Undercode Say
$ crossystem dev_boot_usb=1 $ chromeos-firmwareupdate --mode=recovery --image=malicious.bin $ cgpt add -i 1 -P 15 -S 1 -T 1 malicious.bin
How Exploit
1. Create fake recovery image
2. Bypass signature check
3. Inject root payload
4. Trigger recovery mode
Protection from this CVE
1. Disable USB boot
2. Enable verified boot
3. Update to patched version
Impact
1. Full device compromise
2. Enterprise policy bypass
3. Persistent root access
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
