CVE-2026-63272 Details
Description
LibreOffice can import WMF graphics, which may be embedded in documents. A heap buffer overflow existed when importing a text record that carries its own character advance widths. The count of advance values and the length of the text were read separately from the file and were not required to agree, so drawing the text walked the advance array by character position and ran past its end when the array was the shorter of the two. In fixed versions an advance array shorter than its text is ignored.
A heap buffer overflow vulnerability has been identified in LibreOffice when importing WMF graphics that contain text records with embedded character advance widths. The vulnerability arises because the count of advance values and the length of the text are read separately and do not have to match. This discrepancy allows the text import process to exceed the bounds of the advance array, leading to a buffer overflow. The issue is present in versions of LibreOffice prior to 26.2.5.
Users are advised to upgrade to LibreOffice version 26.2.5 or later.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 22, 2026CISA-ADP
Assessed Sep 22, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.libreoffice.org/about-us/security/advisories/cve-2026-63272 | [email protected] | AdvisoryBundleRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-125 | Out-of-bounds Read | [email protected] |
| CWE-787 | Out-of-bounds Write | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| LibreOffice | All versions |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 22, 2026 | CVE Modified | CISA-ADP |
| Sep 22, 2026 | New CVE Received | [email protected] |