CVE-2026-44210 : faille critique katacontainers kata containers (CVSS 9.9)

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.

Sévérité

Critique (CVSS 9.9)

Vecteur CVSS

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Exploitation active

Non signalée par la CISA

Publication

23 juil. 2026

Dernière mise à jour

6 août 2026

• katacontainers kata containers

• Fiche CVE-2026-44210 sur le NVD (NIST)
• github.com/kata…
• github.com/kata…