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SCA: security update for github.com/kata-containers/kata-containers (GHSA-2gv2-cffp-j227)

critical Tenable Self-Hosted Container Security Plugin ID 442418

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Kata Containers is an open source project focusing on a standard implementation of lightweight Virtual
 Machines (VMs) that perform like containers. Prior to 3.31.0, the runtime-rs standalone virtio-fs path is
 vulnerable to a guest-root to host-root escape. In this configuration, Kata runs the host virtiofsd as
 root with --sandbox none --seccomp none, so an attacker with root-equivalent access inside the guest can
 bypass the guest virtio-fs client entirely by taking over the virtio-fs PCI device and building a
 virtqueue in userspace to submit raw FUSE requests directly to the host virtiofsd. A crafted FUSE_SYMLINK
 request whose new symlink name is an absolute host path is honored outside the configured shared
 directory, allowing guest root to create root-owned symlinks in sensitive host locations such as
 /etc/cron.d. By pointing such a symlink at a guest-controlled crontab payload reachable through a live
 runtime process's mount namespace, the attacker causes the host cron daemon to execute that payload as
 host root, crossing the Kata isolation boundary. This issue is fixed in version 3.31.0. (CVE-2026-47243)

Solution

Update the github.com/kata-containers/kata-containers library and its related packages to version 0.0.0-20260519062212-ffa59ce3aa78 or later.

See Also

https://github.com/advisories/GHSA-2gv2-cffp-j227

Plugin Details

Severity: Critical

ID: 442418

Version: Revision 1.4

Type: Local

Family: SCA Checks

Published: 5/28/2026

Updated: 8/10/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 94.36

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-47243

CVSS v3

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Critical

Base Score: 9.2

Threat Score: 7.1

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 5/27/2026

Vulnerability Publication Date: 5/27/2026

Reference Information

CVE: CVE-2026-47243