# CVE-2025-6196: libgepub: A flaw was found in libgepub, a library used to read EPUB files

CVE-2025-6196 is fixed in libgepub on 1 platform, first by DEBIAN-CVE-2025-6196, released June 17, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-6196
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0024
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 17, 2025

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libgepub Debian 13.5 (trixie) | 0.7.3-1 | [DEBIAN-CVE-2025-6196](https://patchblox.com/security/data/fix/linux/debian-cve-2025-6196.md) | Jun 17, 2025 |
| Linux | libgepub Debian 14 | 0.7.3-1 | [DEBIAN-CVE-2025-6196](https://patchblox.com/security/data/fix/linux/debian-cve-2025-6196.md) | Jun 17, 2025 |
| Linux | libgepub opensuse-leap 15.6 | 0.7.1-150600.3.5.1 | [SUSE-SU-2025:02222-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02222-1.md) | Jul 4, 2025 |
| Linux | libgepub sles 15.6 | 0.7.1-150600.3.5.1 | [SUSE-SU-2025:02222-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02222-1.md) | Jul 4, 2025 |
| Linux | libgepub sles 15.7 | 0.7.1-150600.3.5.1 | [SUSE-SU-2025:02222-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02222-1.md) | Jul 4, 2025 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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