CVE-2026-6047

Name	CVE-2026-6047
Description	LibreOffice can import documents in the OOXML format (DOCX). A heap buffer overflow existed when replaying deferred parser events for a text box element. A handler object was assumed to be of one type and written to at that type's field layout, but it could be a smaller object, so the write landed past the end of the allocation. In fixed versions the type is checked before the write.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libreoffice (PTS)	bullseye	1:7.0.4-4+deb11u10	vulnerable
	bullseye (security)	1:7.0.4-4+deb11u13	vulnerable
	bookworm	4:7.4.7-1+deb12u12	vulnerable
	bookworm (security)	4:7.4.7-1+deb12u11	vulnerable
	trixie	4:25.2.3-2+deb13u4	vulnerable
	trixie (security)	4:25.2.3-2+deb13u5	vulnerable
	forky, sid	4:26.2.4.2-1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libreoffice	source	(unstable)	(unfixed)

https://www.libreoffice.org/about-us/security/advisories/cve-2026-6047