High severity8.8NVD Advisory· Published Dec 7, 2021· Updated Jun 17, 2026
CVE-2021-42979
CVE-2021-42979
Description
NoMachine Cloud Server is affected by Integer Overflow. IOCTL Handler 0x22001B in the NoMachine Cloud Server above 4.0.346 and below 7.7.4 allow local attackers to execute arbitrary code in kernel mode or cause a denial of service (memory corruption and OS crash) via specially crafted I/O Request Packet.
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Affected products
3cpe:2.3:a:nomachine:cloud_server:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:nomachine:cloud_server:*:*:*:*:*:*:*:*range: >4.0.346,<7.7.4
- (no CPE)range: >4.0.346 and <7.7.4
- NoMachine/NoMachine Cloud Serverdescription
Patches
Vulnerability mechanics
References
1- www.sentinelone.com/labs/usb-over-ethernet-multiple-privilege-escalation-vulnerabilities-in-aws-and-other-major-cloud-services/nvdExploitTechnical DescriptionThird Party Advisory
News mentions
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