vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2026-63275

Stack buffer overflow in CFF font hint handling

MEDIUM
5.4
CVSS Score
Published: September 22, 2026 at 11:10 AM UTC
Updated: September 22, 2026 at 07:21 PM UTC
1 product affected across 1 vendorLibreOffice

Using LibreOffice by The Document Foundation?

Get instant alerts when new vulnerabilities affect LibreOffice - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
MEDIUM5.4
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

LibreOffice· Document
60%
26.2 ≤ v < < 26.2.526.2
Affected range stops below < 26.2.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://www.libreoffice.org/about-us/security/advisories/cve-2026-63275

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUMDocument Fdn.
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-787

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card