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Debian dla-4554 : calibre - security update

critical Nessus Plugin ID 311182

Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4554 advisory.

 - ------------------------------------------------------------------------- Debian LTS Advisory DLA-4554-1 [email protected] https://www.debian.org/lts/security/ Abhijith PA April 29, 2026 https://wiki.debian.org/LTS
 - -------------------------------------------------------------------------

 Package : calibre Version : 5.12.0+dfsg-1+deb11u4 CVE ID : CVE-2025-64486 CVE-2026-25635 CVE-2026-25636 CVE-2026-26064 CVE-2026-26065

 Multiple vulnerabilities have been discovered in calibre, an e-book manager

 CVE-2025-64486

 calibre does not validate filenames when handling binary assets in FB2 files, allowing an attacker to write arbitrary files on the filesystem when viewing or converting a malicious FictionBook file. This can be leveraged to achieve arbitrary code execution.

 CVE-2026-25635

 Calibre's CHM reader contains a path traversal vulnerability that allows arbitrary file writes anywhere the user has write permissions.

 CVE-2026-25636

 a path traversal vulnerability in Calibre's EPUB conversion allows a malicious EPUB file to corrupt arbitrary existing files writable by the Calibre process

 CVE-2026-26064

 a path traversal vulnerability that allows arbitrary file writes anywhere the user has write permissions.

 CVE-2026-26065

 Path Traversal through PDB readers that allow arbitrary file writes with arbitrary extension and arbitrary content anywhere the user has write permissions. Files are written in 'wb' mode, silently overwriting existing files. This can lead to potential code execution and Denial of Service through file corruption.

 For Debian 11 bullseye, these problems have been fixed in version 5.12.0+dfsg-1+deb11u4.

 We recommend that you upgrade your calibre packages.

 For the detailed security status of calibre please refer to its security tracker page at:
 https://security-tracker.debian.org/tracker/calibre

 Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade the calibre packages.

See Also

https://security-tracker.debian.org/tracker/source-package/calibre

https://security-tracker.debian.org/tracker/CVE-2025-64486

https://security-tracker.debian.org/tracker/CVE-2026-25635

https://security-tracker.debian.org/tracker/CVE-2026-25636

https://security-tracker.debian.org/tracker/CVE-2026-26064

https://security-tracker.debian.org/tracker/CVE-2026-26065

https://packages.debian.org/source/bullseye/calibre

Plugin Details

Severity: Critical

ID: 311182

File Name: debian_DLA-4554.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 4/30/2026

Updated: 4/30/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.3

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 7

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2026-26065

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.9

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS v4

Risk Factor: Critical

Base Score: 9.3

Threat Score: 8.4

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:calibre, p-cpe:/a:debian:debian_linux:calibre-bin

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/29/2026

Vulnerability Publication Date: 11/7/2025

Reference Information

CVE: CVE-2025-64486, CVE-2026-25635, CVE-2026-25636, CVE-2026-26064, CVE-2026-26065