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Stack buffer overflow in CFF font hint handling

CVSS 4.0 5.4 MEDIUMCheck source for fixed versionsKEV status unknown

cve-program · CVE-2026-63275

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-63275

Published

LibreOffice

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "The Document Foundation",
                    "product": "LibreOffice",
                    "defaultStatus": "unknown",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "26.2",
                            "lessThan": "< 26.2.5",
                            "versionType": "26.2 series"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON

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Sources read 12 Nov 23:52 UTC · 273 of 275 readable · 271 fully read · documentation 469/469 current