Security Digest · Vulnerability record · Known exploited
CVE-2025-47827: IGEL OS Use of a Key Past its Expiration Date Vulnerability
Exploited in the wild (CISA KEV). In IGEL OS before 11, Secure Boot can be bypassed because the igel-flash-driver module improperly verifies a cryptographic signature.
CISA KEV · added 2025-10-14 CVSS 4.6 Medium EPSS 4.9% · p92
Should you act?
Exploited: patch now if you run it
CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Yes, if you run IGEL IGEL OS. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-10-14, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-11-04; treat that as the outer limit, not the target.
- EPSS 4.9%, percentile 92: FIRST’s model estimates a 4.9% chance of exploitation activity in the next 30 days, higher than 92% of all scored CVEs (elevated). EPSS is a probability, not a verdict.
- Needs physical access needed. Lower urgency for most teams unless an attacker could already run code on the machine.
What it is
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’s 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.
Weakness type: CWE-347, CWE-324.
Product: IGEL IGEL OS · Assigned by: mitre · Published: 2025-06-05
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| n/a | n/a | see vendor advisory |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADP | 3.1 | 4.6 Medium | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- Attack vector: physical access needed
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: none
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: added 2025-10-14; federal due date 2025-11-04. Known ransomware use: Unknown.
- CISA 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.
- CISA SSVC assessment: exploitation active, automatable no, technical impact partial.
- FIRST EPSS (model of 2026-10-21): 4.93% probability of exploitation activity in the next 30 days; percentile 92.
Timeline
- — CVE record published by mitre
- — Added to CISA’s Known Exploited Vulnerabilities catalog
- — CISA remediation deadline for US federal agencies
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- msrc.microsoft.com msrc.microsoft.com
Vulnerability records
- CVE.org record CVE-2025-47827 cve.org
- NVD entry CVE-2025-47827 nvd.nist.gov
Government
Other references from the CVE record and advisory
- github.com github.com
- github.com github.com
All exploited IGEL vulnerabilities · Today’s Security Digest