IGEL OS Use of a Key Past its Expiration Date Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2025-10-14

[ Description ]Official description

In IGEL OS before 11, Secure Boot can be bypassed because the igel-flash-driver module improperly verifies a cryptographic signature. Ultimately, a crafted root filesystem can be mounted from an unverified SquashFS image.

CISA: 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.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 4 Nov 2025): Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• github.com/Zedeldi/CVE-2025-47827ExploitThird Party Advisory
• github.com/Zedeldi/igelfsProduct
• msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-47827Third Party Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource