CVE-2026-8050

Local kernel crash via empty IOCTL buffer

Published Jun 17, 2026 · Updated Jun 17, 2026

NULL pointer dereference in the SignalRGB kernel driver before 1.3.7.0 allows local users to crash Windows via an empty IOCTL buffer. Seven IOCTL handlers in SignalIo.sys dereference SystemBuffer without validating caller-supplied buffer lengths, so zero input and output lengths leave the pointer NULL. Any authenticated local user able to open \.\SignalIo can repeatedly crash the Windows kernel, causing availability loss without reported data disclosure or modification.

CVSS severity7.5
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the SignalRGB kernel driver before 1.3.7.0 allows local users to crash Windows via an empty IOCTL buffer. Seven IOCTL handlers in SignalIo.sys dereference SystemBuffer without validating caller-supplied buffer lengths, so zero input and output lengths leave the pointer NULL. Any authenticated local user able to open \.\SignalIo can repeatedly crash the Windows kernel, causing availability loss without reported data disclosure or modification.

The record

CVE
CVE-2026-8050
Published
Jun 17, 2026
Updated
Jun 17, 2026
Vendor
SignalRGB
Product
SignalRGB kernel driver
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.3.7.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

SignalRGB · SignalRGB kernel driverversion=0 <1.3.7.0

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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