CVE-2025-6196

Name	CVE-2025-6196
Description	A flaw was found in libgepub, a library used to read EPUB files. The software mishandles file size calculations when opening specially crafted EPUB files, leading to incorrect memory allocations. This issue causes the application to crash. Known affected usage includes desktop services like Tumbler, which may process malicious files automatically when browsing directories. While no direct remote attack vectors are confirmed, any application using libgepub to parse user-supplied EPUB content could be vulnerable to a denial of service.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, 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
libgepub (PTS)	bullseye	0.6.0-2	vulnerable
	bookworm	0.7.0-2	vulnerable
	trixie, sid	0.7.3-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libgepub	source	(unstable)	0.7.3-1

Notes

[bookworm] - libgepub <no-dsa> (Minor issue)
[bullseye] - libgepub <postponed> (Minor issue)
https://gitlab.gnome.org/GNOME/libgepub/-/issues/18
Fixed by: https://gitlab.gnome.org/GNOME/libgepub/-/commit/70895c45364ef4ee827b39b2ed1c33723410e94c (0.7.2)