CVE-2025-6196 Libgepub: integer overflow in libgepub's epub archive handling
An integer overflow in libgepub allows attackers to cause a denial of service via crafted EPUB files, impacting applications that automatically process these files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-6196?
CVE-2025-6196 is a medium-severity vulnerability in Red Hat Enterprise Linux 7, published on 17 Jun 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-190
Which versions are affected by CVE-2025-6196?
It affects 1 product.
Linux distribution packages (5)
libgepub SUSE:Linux Enterprise Module for Package Hub 15 SP6 | All versions | 0.6.0-150200.3.5.1 |
libgepub SUSE:Linux Enterprise Module for Package Hub 15 SP6 | All versions | 0.7.1-150600.3.5.1 |
libgepub SUSE:Linux Enterprise Module for Package Hub 15 SP7 | All versions | 0.6.0-150200.3.5.1 |
libgepub SUSE:Linux Enterprise Module for Package Hub 15 SP7 | All versions | 0.7.1-150600.3.5.1 |
libgepub openSUSE:Leap 15.6 | All versions | 0.7.1-150600.3.5.1 |
Products include Gnome Libgepub.
How do I fix CVE-2025-6196?
Apply the vendor's patch.
Is CVE-2025-6196 being exploited?
There is no known exploitation of CVE-2025-6196 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2025-6196, GHSA-mpq7-j427-mjff, SUSE-SU-2025:02213-1, SUSE-SU-2025:02222-1, UBUNTU-CVE-2025-6196.