Medium · CVSS 5.5CVE-2025-6196

Libgepub: integer overflow in libgepub's epub archive handlingCVE-2025-6196

Answer in brief

CVE-2025-6196 records a Medium severity (CVSS 5.5) vulnerability in Libgepub: integer overflow in libgepub's epub archive handling. The current sources do not mark it as known exploited. The current feed maps libgepub (generic), Red Hat/libgepub (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jun 17, 2025Updated Nov 5, 2026Source checked Nov 5, 2026First seen by HOL Nov 5, 2026Material review Nov 5, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.5
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps libgepub (generic), Red Hat/libgepub (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
libgepubgeneric	>=0 <0.7.2	0.7.2
Red Hat/libgepubgeneric	*	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for libgepub, Red Hat/libgepub.
Review the reported fix. Source-reported workaround: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to a widespread installation base, or stability. It is strongly recommended to apply the upstream patch once available.

Evidence timeline and material changes

Published upstream
Jun 17, 2025
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Nov 5, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Nov 5, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Package

Affected range

Fixed version

libgepubgeneric

>=0 <0.7.2

0.7.2

Red Hat/libgepubgeneric

Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for libgepub, Red Hat/libgepub.

Review the reported fix. Source-reported workaround: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to a widespread installation base, or stability. It is strongly recommended to apply the upstream patch once available.

Sources and claim methodology

Upstream source description

Quoted source text, attributed separately from HOL analysis.