Bug 2455494

Summary: CVE-2026-34379 mingw-openexr: OpenEXR: Denial of Service due to misaligned memory write during EXR file decoding [fedora-all]
Product: [Fedora] Fedora Reporter: Jon Moroney <jmoroney>
Component: mingw-openexrAssignee: Sandro Mani <manisandro>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: manisandro
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["2f6b3fef-07fd-4b87-ac67-968aadabc5fe"]}
Fixed In Version: mingw-openexr-3.3.9-1.fc43 mingw-openexr-3.3.9-1.fc42 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-04-16 00:53:41 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: 2455402    

Description Jon Moroney 2026-04-06 17:39:17 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.

Comment 1 Fedora Update System 2026-04-07 06:33:30 UTC
FEDORA-2026-d939698c2e (mingw-openexr-3.3.9-1.fc42) has been submitted as an update to Fedora 42.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-d939698c2e

Comment 2 Fedora Update System 2026-04-07 06:33:30 UTC
FEDORA-2026-c803743b67 (mingw-openexr-3.3.9-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-c803743b67

Comment 3 Fedora Update System 2026-04-08 01:51:44 UTC
FEDORA-2026-d939698c2e has been pushed to the Fedora 42 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-d939698c2e`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-d939698c2e

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 4 Fedora Update System 2026-04-08 02:14:14 UTC
FEDORA-2026-c803743b67 has been pushed to the Fedora 43 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-c803743b67`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-c803743b67

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 5 Fedora Update System 2026-04-16 00:53:41 UTC
FEDORA-2026-c803743b67 (mingw-openexr-3.3.9-1.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 6 Fedora Update System 2026-04-16 01:08:59 UTC
FEDORA-2026-d939698c2e (mingw-openexr-3.3.9-1.fc42) has been pushed to the Fedora 42 stable repository.
If problem still persists, please make note of it in this bug report.