IGEL
IGEL OS Use of a Key Past its Expiration Date Vulnerability
At a glance
Actively exploited in the wild — prioritise confirming exposure.
Medium rather than High: exposure is scored at a default because we cannot see your systems or suppliers. If you run or depend on IGEL OS, treat it as High.
Briefing
- Do not treat uncorroborated claims as confirmed breaches.
Questions to ask IT
- Do we run IGEL OS, and is every instance on version 11 or later?
- Is any of it reachable from the internet?
- Have we checked whether it has already been used against us?
- If it is not yet patched, what mitigation is in place, and will the fix be done by 11 Nov?
Next steps
- Confirm exposure, mitigation status and any service interruption risk.
Vulnerability facts
Full CVE detail CVE-2025-47827- 4.6 · MediumExploitable only with physical access without any account, and no one has to click or open anything. High impact on availability.CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Listed: attacks using it have been seen (on the catalogue since )
- ~5.2% estimated chance of attack in 30 days
- Before 11
- 11
- Not linked from the CVE record
Versions are as the CVE record states them; check the vendor advisory before planning a fix.
No technical write-up beyond these facts and the summary below yet.
Next steps
- Confirm whether affected products/versions are present and prioritise patching or mitigations
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.
- CVE-2025-47827 is listed in known-exploited catalogue (exploitation in the wild)
- Authoritative catalogues report active exploitation of this vulnerability.
Why this matters in the UK
- Known-exploited catalogue reports exploitation in the wild
Products and services involved
- IGEL OS82% match confidence · CVE-2025-47827
Pulse
Last checked 4d ago · Recheck overdue since 5 Nov 2026, 23:06 UK time · 3 quiet checks collapsed
in the next 30 days first recorded at 5.2% (lower likelihood signal, not confirmed exploitation). Suggested changed to 7d.
recorded — watch for changes; not confirmed exploitation.
2 quiet checks hidden.
Sources
IGEL OS Use of a Key Past its Expiration Date Vulnerability
How we know
Statements extracted from sources. Higher confidence means stronger corroboration.
- ConfirmedHeadline90% confidence
IGEL OS Use of a Key Past its Expiration Date Vulnerability
- ConfirmedSummary fact75% confidence
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. Affects IGEL IGEL OS. Known ransomware campaign use: Unknown.
- ConfirmedCVE identifier95% confidence
Event involves CVE-2025-47827
- ConfirmedKnown-exploited catalogue98% confidence
CVE-2025-47827 is listed in known-exploited catalogue (exploitation in the wild)