Bug 2539264

Summary: CVE-2026-84447 libheif: libheif: Denial of Service via crafted HEIF/AVIF image files [fedora-43]
Product: [Fedora] Fedora Reporter: Vladimir Vasilev <vvasilev>
Component: libheifAssignee: Michel Lind <michel>
Status: CLOSED ERRATA QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: 43CC: dominik, multimedia-sig, ngompa13
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["4de272bb-2e8c-41cd-b4b3-6420c7c69bab"]}
Fixed In Version: libheif-1.23.5-3.fc43 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-09-26 01:31:06 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: 2443911, 2538128    

Description Vladimir Vasilev 2026-09-23 09:08:21 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.

libheif is a HEIF and AVIF file format decoder and encoder. In 1.23.1 and earlier, crafted grid, iovl, and iden reference graphs can repeatedly decode the same base image because processed_ids is copied per branch and ImageItem::decode_image() has no shared operation budget. This vulnerability is fixed in 1.23.2.
Comment 1 Michel Lind 2026-09-24 11:00:48 UTC 
This bug is already fixed in a published Bodhi update.
Comment 2 Fedora Update System 2026-09-24 11:01:18 UTC 
FEDORA-2026-022ff83e3e (libheif-1.23.5-3.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-022ff83e3e
Comment 3 Fedora Update System 2026-09-26 01:31:06 UTC 
FEDORA-2026-022ff83e3e (libheif-1.23.5-3.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.