LibreOffice 26.2 Stack Buffer Overflow in CFF Font Hint Parsing
CVE-2026-63275 Published on September 22, 2026
Stack buffer overflow in CFF font hint handling
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.
Vulnerability Analysis
CVE-2026-63275 can be exploited with local system access. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2026-63275 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2026-63275
Want to know whenever a new CVE is published for Canonical Ubuntu Linux? stack.watch will email you.
Affected Versions
The Document Foundation LibreOffice:- Version 26.2 and below < 26.2.5 is affected.