Bug 2467657 (CVE-2026-4430)

Summary: CVE-2026-4430 LibreOffice: LibreOffice: Denial of Service via crafted OOXML documents
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in LibreOffice. A remote attacker could exploit this out-of-bounds write vulnerability by tricking a user into opening a specially crafted OOXML (Office Open XML) document with mismatched encryption salt parameters. This could lead to a denial of service (DoS), making the application unavailable, and potentially result in limited information disclosure or integrity impact.
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: 2477895    
Bug Blocks:    

Description OSIDB Bzimport 2026-05-07 08:01:12 UTC
Out-of-bounds write vulnerability in The Document Foundation LibreOffice via crafted OOXML documents with mismatched encryption salt parameters.

This issue affects LibreOffice: from 26.2 before 26.2.3, from 25.8 before 25.8.7.