# Version 28.2.0 'The Awakening' 2018-10-25

## Bug fixes

  - mkvmerge, mkvinfo, mkvextract, mkvpropedit, MKVToolNix     GUI's info tool & chapter editor: fixed a case of memory     being accessed after it had been freed earlier. This can     be triggered by specially crafted Matroska files and     lead to arbitrary code execution. The vulnerability was     reported as Cisco TALOS 2018-0694 on 2018-10-25.

# Version 28.1.0 'Morning Child' 2018-10-23

## Bug fixes

  - mkvmerge: AV1 parser: fixed an error in the sequence     header parser if neither the     `reduced_still_picture_header` nor the     `frame_id_numbers_present_flag` is set. Part of the fix     for #2410.

  - mkvmerge: AV1 parser: when creating the `av1C` structure     for the Codec Private element the sequence header OBU     wasn't copied completely: its common data (type field &     OBU size among others) was missing. Part of the fix for     #2410.

  - mkvmerge: Matroska reader, AV1: mkvmerge will try to     re-create the `av1C` data stored in Codec Private when     reading AV1 from Matroska or WebM files created by     mkvmerge v28.0.0. Part of the fix for #2410.

  - MKVToolNix GUI: info tool: the tool will no longer stop     scanning elements when an EBML Void element is found     after the first Cluster element. Fixes #2413.

# Version 28.0.0 'Voice In My Head' 2018-10-20

## New features and enhancements

  - mkvmerge: AV1 parser: updated the code for the finalized     AV1 bitstream specification. Part of the implementation     of #2261.

  - mkvmerge: AV1 packetizer: updated the code for the     finalized AV1-in-Matroska & WebM mapping specification.
    Part of the implementation of #2261.

  - mkvmerge: AV1 support: the `--engage enable_av1` option     has been removed again. Part of the implementation of     #2261.

  - mkvmerge: MP4 reader: added support for AV1. Part of the     implementation of #2261.

  - mkvmerge: DTS: implemented dialog normalization gain     removal for extension substreams. Implements #2377.

  - mkvmerge, mkvextract: simple text subtitles: added a     workaround for simple text subtitle tracks that don't     contain a duration. Implements #2397.

  - mkvextract: added support for extracting AV1 to IVF.
    Part of the implementation of #2261.

  - mkvextract: IVF extractor (AV1, VP8, VP9): precise     values will be used for the frame rate numerator &     denominator header fields for certain well-known values     of the track's default duration.

  - mkvmerge: VP9: mkvmerge will now create codec private     data according to the VP9 codec mapping described in the     WebM specifications. Implements #2379.

  - MKVToolNix GUI: automatic scaling for high DPI displays     is activated if the GUI is compiled with Qt &ge; 5.6.0.
    Fixes #1996 and #2383.

  - MKVToolNix GUI: added a menu item ('Help' &rarr; 'System     information') for displaying information about the     system MKVToolNix is running on in order to make     debugging easier.

  - MKVToolNix GUI: multiplexer, header editor: the user can     enter a list of predefined track names in the     preferences. She can later select from them in 'track     name' combo box. Implements #2230.

## Bug fixes

  - mkvmerge: JSON identification: fixed a bug when removing     invalid UTF-8 data from strings before they're output as     JSON. Fixes #2398.

  - mkvmerge: MP4/QuickTime reader: fixed handling of PCM     audio with FourCC `in24`. Fixes #2391.

  - mkvmerge: MPEG transport stream reader, teletext     subtitles: the decision whether or not to keep frames     around in order to potentially merge them with the     following frame is made sooner. That avoids problems if     there are large gaps between teletext subtitle frames     which could lead to frames being interleaved too late.
    Fixes #2393.

  - mkvextract: IVF extractor (AV1, VP8, VP8): the frame     rate header fields weren't clamped to 16 bits properly     causing wrong frame rates to be written in certain     situations.

  - mkvpropedit, MKVToolNix GUI's header editor: fixed file     corruption when a one-byte space must be covered with a     new EBML void element but all surrounding elements have     a 'size length' field that's eight bytes long already.
    Fixes #2406.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A use-after-free vulnerability exists in the way MKVToolNix MKVINFO v25.0.0 handles the MKV (matroska)     file format. A specially crafted MKV file can cause arbitrary code execution in the context of the current     user. (CVE-2018-4022)

Note that Nessus relies on the presence of the package as reported by the vendor.

This update for libmatroska, mkvtoolnix fixes the following issues :

Security issue fixed :

  - CVE-2018-4022: Fixed use-after-free vulnerability that     existed in the way MKV (matroska) file format was     handled (bsc#1113709).

ID	Name	Product	Family	Published	Updated	Severity
120384	Fedora 29 : mkvtoolnix (2018-44ea020814)	Nessus	Fedora Local Security Checks	1/3/2019	7/8/2024	high
118809	Fedora 27 : mkvtoolnix (2018-8587111c5a)	Nessus	Fedora Local Security Checks	11/8/2018	7/25/2024	high
254762	Linux Distros Unpatched Vulnerability : CVE-2018-4022	Nessus	Misc.	8/25/2025	10/14/2025	high
119082	openSUSE Security Update : libmatroska / mkvtoolnix (openSUSE-2018-1432)	Nessus	SuSE Local Security Checks	11/21/2018	7/19/2024	high
120333	Fedora 28 : mkvtoolnix (2018-317ecbb54f)	Nessus	Fedora Local Security Checks	1/3/2019	7/8/2024	high
123379	openSUSE Security Update : libmatroska / mkvtoolnix (openSUSE-2019-931)	Nessus	SuSE Local Security Checks	3/27/2019	6/10/2024	high

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