5.4
Medium
CVE-2026-63276 LibreOffice converts CFF fonts to Type 1 when it subsets a font, which happens when a document is exported to PDF, and…
Description
LibreOffice converts CFF fonts to Type 1 when it subsets a font, which happens when a document is exported to PDF, and CFF fonts may be embedded in documents. A stack buffer overflow existed in that conversion. The converted operators were written into a fixed size buffer with no check that they still fit, so a glyph emitting many operators wrote past the end of the buffer. In fixed versions the remaining capacity is tracked and the conversion stops when it is used up.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| LibreOffice 26.2 | 26.2 → latest | No fix stated |
References
- www.libreoffice.org www.libreoffice.org
Timeline
- Published
- Last modified
Other CVEs of LibreOffice
The 48 CVEs of LibreOffice →
CVE-2026-76181
Heap buffer overflow in dBASE index import
5.4
Medium
CVE-2026-63270
URLs could be constructed which expanded environment variable or INI file values, so potentially sensitive information…
6.7
Medium
CVE-2026-63269
LibreOffice can link to audio and video files from a document, and on Linux it plays them with GStreamer
6.7
Medium
CVE-2026-63267
LibreOffice Calc can link a cell range to an external csv data source, and the link is saved in the document
6.7
Medium