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Debian dsa-6502 : mkvtoolnix - security update

high Nessus Plugin ID 346456

Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 13 host has packages installed that are affected by a vulnerability as referenced in the dsa-6502 advisory.

 - ------------------------------------------------------------------------- Debian Security Advisory DSA-6502-1 [email protected] https://www.debian.org/security/ Moritz Muehlenhoff September 16, 2026 https://www.debian.org/security/faq
 - -------------------------------------------------------------------------

 Package : mkvtoolnix CVE ID : CVE-2026-90783

 A buffer overflow was found in the ODML parser of MKVToolNix, a set of command-line tools (and GUI) to work with Matroska files, which could potentially result in the execution of arbitrary code when processing malformed .mkv files.

 For the stable distribution (trixie), this problem has been fixed in version 92.0-1+deb13u1.

 We recommend that you upgrade your mkvtoolnix packages.

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

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

 Mailing list: [email protected]

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

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

Solution

Upgrade the mkvtoolnix packages.

See Also

https://packages.debian.org/source/trixie/mkvtoolnix

https://security-tracker.debian.org/tracker/CVE-2026-90783

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

Plugin Details

Severity: High

ID: 346456

File Name: debian_DSA-6502.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 9/16/2026

Updated: 9/16/2026

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.25

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

CVSS Score Source: CVE-2026-90783

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

CVSS v4

Risk Factor: High

Base Score: 8.5

Threat Score: 5.9

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:13.0, p-cpe:/a:debian:debian_linux:mkvtoolnix-gui, p-cpe:/a:debian:debian_linux:mkvtoolnix

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/16/2026

Vulnerability Publication Date: 9/13/2026

Reference Information

CVE: CVE-2026-90783