Bug 2488958 (CVE-2026-6039)

Summary: CVE-2026-6039 libreoffice: LibreOffice: Denial of Service via specially crafted DXF polyline import
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
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Hardware: All   
OS: Linux   
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A flaw was found in LibreOffice. This vulnerability, a heap buffer overflow, occurs when processing specially crafted DXF (Drawing Exchange Format) polyline files. An attacker could exploit this by convincing a user to open a malicious DXF file, which may lead to a denial of service (DoS) due to application instability and system unavailability.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2489176    
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Description OSIDB Bzimport 2026-06-15 18:01:26 UTC 
LibreOffice can import drawings in the DXF format used by CAD software. A heap buffer overflow existed when importing a DXF polyline. The point count taken from the file was truncated to a 16-bit value when the point buffer was sized, while the full count was used to fill it, so a polyline whose point count exceeded the 16-bit range was written past the end of the buffer. In fixed versions such oversized polylines are rejected.