CVE-2026-8357

Name	CVE-2026-8357
Description	LibreOffice Calc compiles cell formulas when opening a spreadsheet. A heap buffer overflow existed when compiling a very long formula made up of many opening tokens. The array that tracks nesting depth was allocated one element too small for that worst case, so such a formula wrote one element past its end. In fixed versions the array is sized to hold the largest possible nesting.
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)
References	DSA-6346-1

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	fixed
	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	trixie	4:25.2.3-2+deb13u5		DSA-6346-1
libreoffice	source	(unstable)	(unfixed)

https://www.libreoffice.org/about-us/security/advisories/cve-2026-8357