CVE-2026-6039
Heap buffer overflow in DXF polyline import
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-787 CWE-197 |
| Vendor | the document foundation |
| Product | libreoffice |
| Published | Jun 15, 2026 |
| Last Updated | Jun 15, 2026 |
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Affected Versions
The Document Foundation / LibreOffice
25.8 < < 25.8.7 26.2 < < 26.2.3
References
Credits
Anthropic (automated discovery using Claude) Trail of Bits (triage and validation)