kata-containers Kata Containers up to 3.30.x virtiofsd information disclosure

Summaryinfo

A vulnerability described as problematic has been identified in kata-containers Kata Containers up to 3.30.x. Impacted is an unknown function of the component virtiofsd. Such manipulation of the argument io.katacontainers.config.hypervisor.virtio_fs_extra_args leads to information disclosure. This vulnerability is uniquely identified as CVE-2026-44210. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in kata-containers Kata Containers up to 3.30.x. Affected by this issue is an unknown code block of the component virtiofsd. The manipulation of the argument io.katacontainers.config.hypervisor.virtio_fs_extra_args with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

Kata Containers is an open source project focusing on a standard implementation of lightweight Virtual Machines (VMs) that perform like containers. Versions prior to 3.31.0 ship with a default configuration that allows pod creators to inject arbitrary command-line arguments into the virtiofsd process through the `io.katacontainers.config.hypervisor.virtio_fs_extra_args` pod annotation. By injecting `-o source=/` along with `--no-announce-submounts` and `--sandbox=none`, an attacker can override the virtiofsd shared directory to serve the entire host root filesystem into the guest VM. Combined with the `kernel_params` annotation (also enabled by default) to activate the agent debug console, the attacker can mount the host filesystem from inside the VM and read or write any file on the host, including /etc/shadow. Version 3.31.0 patches the issue.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-44210 since 05/05/2026. The exploitation is known to be easy. The attack may be launched remotely. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading to version 3.31.0 eliminates this vulnerability.

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Productinfo

Type

• Virtualization Software

Vendor

• kata-containers

Name

• Kata Containers

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.10
• 3.11
• 3.12
• 3.13
• 3.14
• 3.15
• 3.16
• 3.17
• 3.18
• 3.19
• 3.20
• 3.21
• 3.22
• 3.23
• 3.24
• 3.25
• 3.26
• 3.27
• 3.28
• 3.29
• 3.30

CPE 2.3info

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CPE 2.2info

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