CVE-2026-63275 | BDVDB-2026-377671 Detail

The Document FoundationLibreOffice

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.

Impact#

CAPEC-44 Overflow Binary Resource File

Weaknesses#

CWE-787 Out-of-bounds Write

References#

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

Exploit#

No public exploit known

History#

Version 12026-09-22Record published in the CVE List.

Published

Published: 2026-09-22
Last modified: 2026-09-22

Vendor information

Vendor: The Document Foundation
Product: LibreOffice

All The Document Foundation vulnerabilities

Score

5.4 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 8.3.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Memory Corruption

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 26.2 and < < 26.2.5
Fixed
< 26.2.5

Scoring System

CVSS v4.0

5.4 Medium

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P

Metric breakdown
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

CVSS v3.1

Not available

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).