CVE-2026-6039
Medium
Description
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.
SeverityMedium
CVSS5.4
Exploit probability—
ProductLibreOffice
PublishedJun 15, 2026
First seenJun 15, 2026
Weakness typeCWE-787Out-of-bounds writeCWE-197CWE-197
How to fix
Update
- The Document Foundation LibreOffice< 25.8.7, < 26.2.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| The Document Foundation LibreOffice | 25.8 ≤ v < < 25.8.7, 26.2 ≤ v < < 26.2.3 | < 25.8.7, < 26.2.3 |
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