Virtualisation security covers hypervisors, virtual machines, and isolated workloads, where flaws or misconfiguration can expose systems and data.
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Background for this topic.
Virtualisation uses software to divide or simulate computing resources so multiple isolated virtual machines (VMs) can share a physical host. Each VM can run its own operating system and applications; a hypervisor controls access to the host’s processors, memory, storage and devices. The term can also include virtual networks and storage, while containers provide a related but less isolated form of workload virtualisation.
Security depends on the hypervisor and its management plane being securely configured, patched and access-controlled. A hypervisor vulnerability or misconfiguration can expose data across VMs, and a VM escape can allow code running in one guest to reach the host or other guests. Virtual machine images, templates and snapshots may retain credentials or sensitive data and therefore require inventory, integrity checks, encryption and controlled retention. Network segmentation between virtual workloads should be enforced through explicit policies rather than assumed from virtual separation. These controls also support reliable investigation and recovery by preserving trustworthy images and records of administrative changes.
More than 41,000 ESXi instances remain vulnerable to a critical VMware vulnerability, one of three that Broadcom disclosed earlier this week.
Over 37,000 internet-exposed VMware ESXi instances are vulnerable to CVE-2025-22224, a critical out-of-bounds write flaw that is actively exploited in the wild. [...]
Vulnerabilities Can Apparently Be Chained Together to Execute a Hypervisor EscapeBroadcom's VMware cloud infrastructure software division has issued updates to patch three actively exploited zero-day vulnerabilities in all supported versions of its ESXi hypervisor operating system, which can be used to escape from the hypervisor, in what's also known as a virtual machine escape.
The now-patched bugs are under active exploit and enable attackers to carry out a wide range of malicious activities, including escaping a virtual machine and gaining access to the underlying host.
The heap overflow zero-day in the memory unsafe code by Miss Creant Broadcom today pushed out patches for three VMware hypervisor-hijacking bugs, including one rated critical, that have already been found and exploited by criminals.…
Cloud software firm VMware has issued a critical security advisory, detailing three zero-day vulnerabilities being actively exploited in the wild
Broadcom has released security updates to address three actively exploited security flaws in VMware ESXi, Workstation, and Fusion products that could lead to code execution and information disclosure
Broadcom warned customers today about three VMware zero-days, tagged as exploited in attacks and reported by the Microsoft Threat Intelligence Center. [...]