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Fencer Vulns
critical 9.8

CVE-2019-12874 json

An issue was discovered in zlib_decompress_extra in modules/demux/mkv/util.cpp in VideoLAN VLC media player 3.x through 3.0.7.

published 2019-06-18 7 y ago modified 2026-11-02 6 d ago also EUVD-2019-4453

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.4%
EPSS 2.4% chance of exploitation in 30 days, percentile 84%
public exploits
0
none known

Summary

An issue was discovered in zlib_decompress_extra in modules/demux/mkv/util.cpp in VideoLAN VLC media player 3.x through 3.0.7. The Matroska demuxer, while parsing a malformed MKV file type, has a double free.

Patch / fix

  • vlc Debian 14, Debian 13, Debian 12 3.0.7-1

debian advisories DEBIAN-CVE-2019-12874

  • vlc Ubuntu 18.04 LTS 3.0.7.1-0ubuntu18.04.1

ubuntu advisories UBUNTU-CVE-2019-12874

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • vlc Package Hub 15 3.0.7.1-bp150.2.6.1
  • libaom Package Hub 15 1.0.0-bp150.2.1
  • vlc openSUSE Leap 15.0 3.0.7.1-lp150.8.1
  • libaom openSUSE Leap 15.0 1.0.0-lp150.2.1
  • vlc Package Hub 15 SP1 3.0.7.1-bp151.5.3.3
  • vlc openSUSE Leap 15.1 3.0.7.1-lp151.6.3.1

opensuse advisories openSUSE-SU-2019:2015-1openSUSE-SU-2019:1909-1openSUSE-SU-2019:1897-1openSUSE-SU-2019:1840-1

  • vlc Arch Linux 3.0.7.1-1

arch linux advisories AVG-998

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
6 d ago

Exploit prediction

2.39% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.