MEDIUM 5.4 NVD

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 CFF fonts may be embedded in documents. A

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.

References

https://www.libreoffice.org/about-us/security/advisories/cve-2026-63276

Published: 2026-09-22 · Source: NVD · Feed updated: 2026-09-22

This medium severity vulnerability with a CVSS score of 5.4 was published on 2026-09-22 via NVD.

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