CVE entry · CVE-2025-47827
CVE-2025-47827: IGEL OS Use of a Key Past its Expiration Date Vulnerability
IGEL OS contains a use of a key past its expiration date vulnerability that allows for Secure Boot bypass. The igel-flash-driver module improperly verifies a cryptographic signature. Ultimately, a crafted root filesystem can be mounted from an unverified SquashFS image.
- Actively exploited: added to CISA’s KEV catalog on October 14, 2025.
- Use by ransomware: not established so far.
- Remediation deadline for US federal agencies: November 4, 2025.
Description from CISA’s KEV catalog.
What to do
- Check whether your estate includes IGEL OS, including internet-facing devices.
- Apply the vendor’s patch or mitigations (references below). Failing that, isolate the product or stop using it, as CISA requires of US federal agencies.
- An exploited vulnerability has often been used before it was fixed: look for signs of compromise, especially on internet-facing devices.
References
- Vendor advisory or reference cited by CISA (msrc.microsoft.com)
- NVD entry (NIST)
- CISA KEV catalog