CVE-2026-63272

Heap buffer overflow in WMF text record import

State: Published
Severity: 5.4 Medium
Published: Sep 22, 2026
Updated: Sep 22, 2026
Reserved: Jul 16, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	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	Document Fdn.

Weaknesses

CWE-787 Out-of-bounds Write
CWE-125 Out-of-bounds Read

Affected Products

Product	Versions
LibreOfficeThe Document Foundation	26.2 to before < 26.2.5Affected

References

https://www.libreoffice.org/about-us/security/advisories/cve-2026-63272

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