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CVE-2026-44210— Kata Containers have VM Escape via virtiofsd Argument Injection through Default-Enabled Pod Annotations

Quick assessment

Affected
kata-containers kata-containers
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Kata Containers是Kata Containers组织开源的一款轻量级虚拟机构建程序。 Kata Containers 3.31.0之前版本存在命令注入漏洞，该漏洞源于默认配置允许通过 注释注入任意命令行参数，结合 注释激活调试控制台，导致攻击者可读取或写入主机上的任意文件。

CVSS 5.8 · Medium EPSS 0.59% · P48

Affected Version Matrix 1

VendorProduct Version RangeStatus
kata-containers kata-containers < 3.31.0 affected
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I. Basic Information for CVE-2026-44210

Vulnerability Information
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Vulnerability Title
Kata Containers have VM Escape via virtiofsd Argument Injection through Default-Enabled Pod Annotations
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:P
Source: CVE Program / CVE List V5
Vulnerability Type
参数注入或修改
Source: CVE Program / CVE List V5
Vulnerability Title
Kata Containers 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kata Containers是Kata Containers组织开源的一款轻量级虚拟机构建程序。 Kata Containers 3.31.0之前版本存在命令注入漏洞，该漏洞源于默认配置允许通过`io.katacontainers.config.hypervisor.virtio_fs_extra_args`注释注入任意命令行参数，结合`kernel_params`注释激活调试控制台，导致攻击者可读取或写入主机上的任意文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
kata-containers kata-containers < 3.31.0 -

II. Public POCs for CVE-2026-44210

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III. Intelligence Information for CVE-2026-44210

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Patches & Fixes for CVE-2026-44210 (1)

Vendor Advisories for CVE-2026-44210 (1)

IV. Related Vulnerabilities

Same product: kata-containers
Same vendor: kata-containers
Same weakness: CWE-88

V. Comments for CVE-2026-44210

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