Risk Letters

Exploited vulnerability

CVE-2025-47827

TLP:CLEAR

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.

Facts

  • Vendor: IGEL
  • Product: IGEL OS
  • CVSS: 4.6
  • EPSS (probability of exploitation within 30 days): 5.2 %
  • On CISA's Known Exploited Vulnerabilities list since: 14 October 2025
  • First known exploitation: 14 October 2025
  • CISA's deadline for US federal agencies: 4 November 2025
  • Weakness: CWE-324
  • First seen by Risk Letters: 14 October 2025

Members see which Nordic sectors the flaw hits, and what to do about it.

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD