Description
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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | vlc | 3.0.7-1 | — |
| Debian 13 | vlc | 3.0.7-1 | — |
| Debian 12 | vlc | 3.0.7-1 | — |
| Debian 9 | vlc | 3.0.7-0+deb9u1 | DSA-4459-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | vlc | 3.0.7.1-0ubuntu18.04.1 | USN-4074-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | vlc | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP1 | vlc | 3.0.7.1-bp151.5.3.3 | openSUSE-SU-2019:1897-1 |
| SUSE Package Hub 15 | libaom | 1.0.0-bp150.2.1 | openSUSE-SU-2019:2015-1 |
| SUSE Package Hub 15 | vlc | 3.0.7.1-bp150.2.6.1 | openSUSE-SU-2019:2015-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.1 | vlc | 3.0.7.1-lp151.6.3.1 | openSUSE-SU-2019:1840-1 |
| openSUSE Leap 15.0 | libaom | 1.0.0-lp150.2.1 | openSUSE-SU-2019:1909-1 |
| openSUSE Leap 15.0 | vlc | 3.0.7.1-lp150.8.1 | openSUSE-SU-2019:1909-1 |
Advisories 6
- USN-4074-1 vlc vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-4459-1 vlc - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2019:2015-1 Security update for vlc SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:1909-1 Security update for vlc SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:1897-1 Security update for vlc SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:1840-1 Security update for vlc SUSE / openSUSE Security Updates · Feb 4, 2026
References
- http://git.videolan.org/?p=vlc.git%3Ba=commit%3Bh=81023659c7de5ac2637b4a879195efef50846102
- 108882 vdb-entry
- USN-4074-1 vendor-advisory
- openSUSE-SU-2019:1840 vendor-advisory
- openSUSE-SU-2019:1909 vendor-advisory
- openSUSE-SU-2019:1897 vendor-advisory
- GLSA-201908-23 vendor-advisory
- openSUSE-SU-2019:2015 vendor-advisory