CVE-2026-6039
MediumCVSS 5.4Exploitation Probability (EPSS)
Low risk2th percentile — higher than 2% of all known CVEs
Summary
LibreOffice had a heap buffer overflow vulnerability when importing DXF polylines. The point count from the file was truncated to a 16-bit value, leading to writing past the end of the buffer when the point count exceeded this range.
Risk Assessment
An attacker could exploit this vulnerability to execute malicious code, posing a risk to the integrity and confidentiality of user data.
Recommendation
It is recommended to update LibreOffice to the latest version where oversized polylines are rejected.
Original NVD description (English source)
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.