CVEs / CVE-2025-47827
CVE-2025-47827: IGEL OS Use of a Key Past its Expiration Date Vulnerability
- Known exploited in the CISA KEV catalog since 14 Oct 2025
- medium 4.6 CVSS 3.1 (from the CNA)
- EPSS 4.92% chance of exploitation in the next 30 days, higher than 92% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
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.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| n/a n/a | n/a | — |
Exploitation
| In CISA KEV since | 14 Oct 2025 |
|---|---|
| Due date for US federal agencies | 4 Nov 2025 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. |
Severity
| CVSS 3.1 | 4.6 mediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HScored by the CNA (134c704f-9b21-4f2e-91b3-4a467353bcc0) |
|---|---|
| Weakness | CWE-347 |
References
- CVE-2025-47827 on NVD
- CVE-2025-47827 in the CISA KEV catalog
- https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-47827 (cited by CISA)
- https://github.com/Zedeldi/CVE-2025-47827 Exploit, Third Party Advisory
- https://github.com/Zedeldi/igelfs Product
- https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-47827 Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-47827 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.