CVE-2026-63275
Stack buffer overflow in CFF font hint handling
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
LibreOffice can read CFF fonts, which may be embedded in documents. A stack buffer overflow existed when reading the hints of a glyph. The number of hints was checked against the wrong bound, so a glyph declaring more hints than the array can hold wrote past its end. In fixed versions the hint count is checked against the capacity the array really has.
| CWE | CWE-787 |
| Vendor | the document foundation |
| Product | libreoffice |
| Published | Sep 22, 2026 |
| Last Updated | Sep 22, 2026 |
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Affected Versions
The Document Foundation / LibreOffice
26.2 < < 26.2.5
References
Credits
Claude, found by Anthropic using agents to study the security of open-source projects Ada Logics, validating and reporting Caolán McNamara of Collabora Productivity