CVE-2026-63276 - Stack buffer overflow in CFF to Type 1 font conversion

CVE-2026-63276 - Stack buffer overflow in CFF to Type 1 font conversion

https://cvefeed.io/rssfeed/latest.atom / Tue, 09/22/2026 - 16:33
CVE ID :CVE-2026-63276
Published : Sept. 22, 2026, 12:17 p.m. | 53 minutes ago
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.
Severity: 5.4 | MEDIUM
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