Bug 2496497

Summary: CVE-2026-44740 chezmoi: Billy: Denial of Service via crafted input due to insufficient validation [fedora-all]
Product: [Fedora] Fedora Reporter: Lukas Javorsky <ljavorsk>
Component: chezmoiAssignee: Mikel Olasagasti Uranga <mikel>
Status: CLOSED ERRATA QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: go-sig, mikel
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["04379d05-8f5e-4cbd-8495-8bd5035240b8"]}
Fixed In Version: chezmoi-2.72.0-1.fc44 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-08-11 01:01:18 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: 2483894    

Description Lukas Javorsky 2026-07-02 13:02:22 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.

Billy is an interface filesystem abstraction for Go. Prior to versions 5.9.0 and 6.0.0-alpha.1, multiple components may improperly handle crafted or malformed input, resulting in panics, infinite loops, uncontrolled recursion, or excessive resource consumption. These issues arise from insufficient validation and missing safety mechanisms such as cycle detection, recursion limits, or defensive handling of unexpected states when processing untrusted repository data and filesystem structures. This issue has been patched in versions 5.9.0 and 6.0.0-alpha.1.
Comment 1 Fedora Update System 2026-08-03 10:11:35 UTC 
FEDORA-2026-4ca48be67c (chezmoi-2.72.0-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-4ca48be67c
Comment 2 Fedora Update System 2026-08-04 01:41:15 UTC 
FEDORA-2026-4ca48be67c has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-4ca48be67c`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-4ca48be67c

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
Comment 3 Fedora Update System 2026-08-11 01:01:18 UTC 
FEDORA-2026-4ca48be67c (chezmoi-2.72.0-1.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.