Bug 2507711

Summary: CVE-2026-42306 podman: Moby container framework: Host file overwrite via race condition in docker cp mount setup [fedora-all]
Product: [Fedora] Fedora Reporter: Matteo Signorini <msignori>
Component: podmanAssignee: Lokesh Mandvekar <lsm5>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: bbaude, debarshir, dwalsh, go-sig, jnovy, lsm5, mboddu, mheon, nsella, patrick, pholzing, suraj.ghimire7
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["93171e02-3645-4f6c-ad7c-68f121520a10"]}
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-07-28 12:55:27 UTC 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: 2488484    

Description Matteo Signorini 2026-07-27 20:47:24 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.

Moby is an open source container framework. In Docker Engine prior to version 29.5.1, Docker Daemon versions 28.5.2 and prior, and Moby Daemon prior to version 2.0.0-beta.14, a race condition during docker cp mount setup allows a malicious container to redirect a bind mount target to an arbitrary host path, potentially overwriting host files or causing denial of service. This issue has been patched in Docker Engine version 29.5.1 and Moby Daemon version 2.0.0-beta.14.
Comment 1 Lokesh Mandvekar 2026-07-28 12:55:27 UTC 
Hi Matteo, the "CVE-2026-42306" in bz summary gives me a 404. Can we please ensure that the cve page works before the bugs are filed?

Anyway, podman doesn't depend on the docker/moby daemon, so this is NOTABUG.