What’s Vulnerable › Vulnerabilities
CVE-2026-6039: Heap buffer overflow in DXF polyline import
- Severity: medium (CVSS 5.4 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-06-15 · updated 2026-10-25
- Weakness: CWE-197
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.
Affected products
- The Document Foundation LibreOffice: from 25.8 before < 25.8.7; from 26.2 before < 26.2.3 — fixed in < 25.8.7, < 26.2.3
How to fix
Upgrade to a fixed version: The Document Foundation LibreOffice < 25.8.7, < 26.2.3. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2026-6039 or the next vulnerability affects your stack