CVE-2026-63275
Published:September 22, 2026
Updated:September 23, 2026
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.
Affected Packages
https://github.com/LibreOffice/core.git (GITHUB):
Affected version(s) >=libreoffice-26.8.0.0.alpha1 <libreoffice-26.8.0.3Fix Suggestion:
Update to version libreoffice-26.8.0.3https://github.com/LibreOffice/core.git (GITHUB):
Affected version(s) >=libreoffice-26.2.0.0.alpha1 <libreoffice-26.2.5.2Fix Suggestion:
Update to version libreoffice-26.2.5.2Related Resources (2)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.4
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
Exploit Maturity
POC
CVSS v3
Base Score:
6.6
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
HIGH
Weakness Type (CWE)
Out-of-bounds Write