CVE-2026-63276
mediumpriority · track · 0EPSS 0.002 · 9 %ileDEEPSS · scored 2026-10-23
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-3521LibreOffice: Mehrere SchwachstellenDeutsch2026-09-22csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen in LibreOffice ausnutzen, um einen Denial of Service Angriff durchzuführen, Daten zu manipulieren oder Informationen offenzulegen.
sources
Which sources assert this record, and when.
references (1) nvd
External citations — patches, advisories, analysis.
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