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.
CVE-2019-12874
CVSS base score
9.8 (v3.0)
Severity
CRITICAL
Attack vector
Network
Weakness
CWE-415
Last modified
November 2, 2026
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
videolan vlc media player