CVE-2025-6196

MEDIUM 5.5

Libgepub: integer overflow in libgepub's epub archive handling

CVSS Score

5.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-190
Published	Jun 17, 2025
Last Updated	Nov 6, 2025

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

Red Hat / Red Hat Enterprise Linux 7

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

access.redhat.com: https://access.redhat.com/security/cve/CVE-2025-6196 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2373117 gitlab.gnome.org: https://gitlab.gnome.org/GNOME/libgepub/-/issues/18

Credits

Red Hat would like to thank Mohammad Hussam Alzeyyat - mhzcyber for reporting this issue.