Bug 2520380

Summary: CVE-2026-77176 kata-containers: Insufficient validation of CreateContainer mount and storage rules in genpolicy [fedora-all]
Product: [Fedora] Fedora Reporter: subhro
Component: kata-containersAssignee: Christophe de Dinechin <dinechin>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: dinechin, eblima, go-sig
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["b370ee03-c87f-4a7f-83f0-eaff42d8680f"]}
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2517502    

Description subhro 2026-08-20 15:33:59 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

In Kata Containers configurations that use genpolicy for Confidential Containers guest protection, insufficient validation of CreateContainer mount and storage rules allows a malicious host operator to craft CreateContainer requests that cause arbitrary container-rootfs paths to be mounted over host-provided locations (such as /etc/hostname, /etc/hosts, /etc/resolv.conf, Kubernetes/Azure service-account token paths, and other volume mounts), or to provision arbitrary content under /dev/shm and /dev/termination-log. Applications that treat those paths as non-sensitive or guest-only may expose confidential information or accept attacker-controlled input. Standard Kata sandboxing is not affected.