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CVE-2018-19857

The CAF demuxer in modules/demux/caf.c in VideoLAN VLC media player 3.0.4 may read memory from an...

9.1 CriticalFix available

The CAF demuxer in modules/demux/caf.c in VideoLAN VLC media player 3.0.4 may read memory from an uninitialized pointer when processing magic cookies in CAF files, because a ReadKukiChunk() cast converts a return value to an unsigned int even if that value is negative. This could result in a denial of service and/or a potential infoleak.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
High

Exploit likelihood

3.92%Up 1.3 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 9.1

The CAF demuxer in modules/demux/caf.c in VideoLAN VLC media player 3.0.4 may read memory from an uninitialized pointer when processing magic cookies in CAF files, because a ReadKukiChunk() cast converts a return value to an unsigned int even if that value is negative. This could result in a denial of service and/or a potential infoleak.

Record
CVE-2018-19857
CVSS 3.0
9.1 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CVSS 2.0
6.4 MediumAV:N/AC:L/Au:N/C:P/I:N/A:P
Weakness
CWE-824
Updated
2026-11-02
CVE List No score

The CAF demuxer in modules/demux/caf.c in VideoLAN VLC media player 3.0.4 may read memory from an uninitialized pointer when processing magic cookies in CAF files, because a ReadKukiChunk() cast converts a return value to an unsigned int even if that value is negative. This could result in a denial of service and/or a potential infoleak.

Record
CVE-2018-19857
Updated
2026-11-02
EUVDEUVD-2018-11532 No score

The CAF demuxer in modules/demux/caf.c in VideoLAN VLC media player 3.0.4 may read memory from an uninitialized pointer when processing magic cookies in CAF files, because a ReadKukiChunk() cast converts a return value to an unsigned int even if that value is negative. This could result in a denial of service and/or a potential infoleak.

Record
EUVD-2018-11532
Updated
2026-11-02
GitHub AdvisoriesGHSA-7g6v-cgr9-2355 9.1

The CAF demuxer in modules/demux/caf.c in VideoLAN VLC media player 3.0.4 may read memory from an...

The CAF demuxer in modules/demux/caf.c in VideoLAN VLC media player 3.0.4 may read memory from an uninitialized pointer when processing magic cookies in CAF files, because a ReadKukiChunk() cast converts a return value to an unsigned int even if that value is negative. This could result in a denial of service and/or a potential infoleak.

Record
GHSA-7g6v-cgr9-2355
CVSS 3.0
9.1 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weakness
CWE-824
Updated
2026-11-02
OSV 9.1

The CAF demuxer in modules/demux/caf.c in VideoLAN VLC media player 3.0.4 may read memory from an uninitialized pointer when processing magic cookies in CAF files, because a ReadKukiChunk() cast converts a return value to an unsigned int even if that value is negative. This could result in a denial of service and/or a potential infoleak.

Record
CVE-2018-19857
CVSS 3.0
9.1 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2018-19857 9.1

The CAF demuxer in modules/demux/caf.c in VideoLAN VLC media player 3.0.4 may read memory from an uninitialized pointer when processing magic cookies in CAF files, because a ReadKukiChunk() cast converts a return value to an unsigned int even if that value is negative. This could result in a denial of service and/or a potential infoleak.

Record
DEBIAN-CVE-2018-19857
CVSS 3.0
9.1 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Updated
2026-11-02
Show 7 moreShow less
OSVUBUNTU-CVE-2018-19857 9.1

The CAF demuxer in modules/demux/caf.c in VideoLAN VLC media player 3.0.4 may read memory from an uninitialized pointer when processing magic cookies in CAF files, because a ReadKukiChunk() cast converts a return value to an unsigned int even if that value is negative. This could result in a denial of service and/or a potential infoleak.

Record
UBUNTU-CVE-2018-19857
CVSS 3.0
9.1 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2019:1840-1 No score

Security update for vlc

This update for vlc to version 3.0.7.1 fixes the following issues:

Security issues fixed:

  • CVE-2019-5439: Fixed a buffer overflow (bsc#1138354).
  • CVE-2019-5459: Fixed an integer underflow (bsc#1143549).
  • CVE-2019-5460: Fixed a double free (bsc#1143547).
  • CVE-2019-12874: Fixed a double free in zlib_decompress_extra in modules/demux/mkv/util.cpp (bsc#1138933).
  • CVE-2019-13602: Fixed an integer underflow in mp4 demuxer (boo#1141522).
  • CVE-2019-13962: Fixed a heap-based buffer over-read in avcodec (boo#1142161).

Non-security issues fixed:

  • Video Output:
    • Fix hardware acceleration with some AMD drivers
    • Improve direct3d11 HDR support
  • Access:
    • Improve Blu-ray support
  • Audio output:
    • Fix pass-through on Android-23
    • Fix DirectSound drain
  • Demux: Improve MP4 support
  • Video Output:
    • Fix 12 bits sources playback with Direct3D11
    • Fix crash on iOS
    • Fix midstream aspect-ratio changes when Windows hardware decoding is on
    • Fix HLG display with Direct3D11
  • Stream Output: Improve Chromecast support with new ChromeCast apps
  • Misc:
    • Update Youtube, Dailymotion, Vimeo, Soundcloud scripts
    • Work around busy looping when playing an invalid item with loop enabled
  • Updated translations.
Record
openSUSE-SU-2019:1840-1
Updated
2026-11-02
OSVopenSUSE-SU-2019:1897-1 No score

Security update for vlc

This update for vlc to version 3.0.7.1 fixes the following issues:

Security issues fixed:

  • CVE-2019-5439: Fixed a buffer overflow (bsc#1138354).
  • CVE-2019-5459: Fixed an integer underflow (bsc#1143549).
  • CVE-2019-5460: Fixed a double free (bsc#1143547).
  • CVE-2019-12874: Fixed a double free in zlib_decompress_extra in modules/demux/mkv/util.cpp (bsc#1138933).
  • CVE-2019-13602: Fixed an integer underflow in mp4 demuxer (boo#1141522).
  • CVE-2019-13962: Fixed a heap-based buffer over-read in avcodec (boo#1142161).

Non-security issues fixed:

  • Video Output:
    • Fix hardware acceleration with some AMD drivers
    • Improve direct3d11 HDR support
  • Access:
    • Improve Blu-ray support
  • Audio output:
    • Fix pass-through on Android-23
    • Fix DirectSound drain
  • Demux: Improve MP4 support
  • Video Output:
    • Fix 12 bits sources playback with Direct3D11
    • Fix crash on iOS
    • Fix midstream aspect-ratio changes when Windows hardware decoding is on
    • Fix HLG display with Direct3D11
  • Stream Output: Improve Chromecast support with new ChromeCast apps
  • Misc:
    • Update Youtube, Dailymotion, Vimeo, Soundcloud scripts
    • Work around busy looping when playing an invalid item with loop enabled
  • Updated translations.

This update was imported from the openSUSE:Leap:15.1:Update update project.

Record
openSUSE-SU-2019:1897-1
Updated
2026-11-02
OSVopenSUSE-SU-2019:1909-1 No score

Security update for vlc

This update for vlc to version 3.0.7.1 fixes the following issues:

Security issues fixed:

  • CVE-2019-5439: Fixed a buffer overflow (bsc#1138354).
  • CVE-2019-5459: Fixed an integer underflow (bsc#1143549).
  • CVE-2019-5460: Fixed a double free (bsc#1143547).
  • CVE-2019-12874: Fixed a double free in zlib_decompress_extra in modules/demux/mkv/util.cpp (bsc#1138933).
  • CVE-2019-13602: Fixed an integer underflow in mp4 demuxer (boo#1141522).
  • CVE-2019-13962: Fixed a heap-based buffer over-read in avcodec (boo#1142161).

Non-security issues fixed:

  • Video Output:
    • Fix hardware acceleration with some AMD drivers
    • Improve direct3d11 HDR support
  • Access:
    • Improve Blu-ray support
  • Audio output:
    • Fix pass-through on Android-23
    • Fix DirectSound drain
  • Demux: Improve MP4 support
  • Video Output:
    • Fix 12 bits sources playback with Direct3D11
    • Fix crash on iOS
    • Fix midstream aspect-ratio changes when Windows hardware decoding is on
    • Fix HLG display with Direct3D11
  • Stream Output: Improve Chromecast support with new ChromeCast apps
  • Misc:
    • Update Youtube, Dailymotion, Vimeo, Soundcloud scripts
    • Work around busy looping when playing an invalid item with loop enabled
  • Updated translations.

New package libaom:

  • Initial version 1.0.0
  • A library for AOMedia Video 1 (AV1), an open, royalty-free video coding format designed for video transmissions over the Internet.
Record
openSUSE-SU-2019:1909-1
Updated
2026-11-02
OSVopenSUSE-SU-2019:2015-1 No score

Security update for vlc

This update for vlc to version 3.0.7.1 fixes the following issues:

Security issues fixed:

  • CVE-2019-5439: Fixed a buffer overflow (bsc#1138354).
  • CVE-2019-5459: Fixed an integer underflow (bsc#1143549).
  • CVE-2019-5460: Fixed a double free (bsc#1143547).
  • CVE-2019-12874: Fixed a double free in zlib_decompress_extra in modules/demux/mkv/util.cpp (bsc#1138933).
  • CVE-2019-13602: Fixed an integer underflow in mp4 demuxer (boo#1141522).
  • CVE-2019-13962: Fixed a heap-based buffer over-read in avcodec (boo#1142161).

Non-security issues fixed:

  • Video Output:
    • Fix hardware acceleration with some AMD drivers
    • Improve direct3d11 HDR support
  • Access:
    • Improve Blu-ray support
  • Audio output:
    • Fix pass-through on Android-23
    • Fix DirectSound drain
  • Demux: Improve MP4 support
  • Video Output:
    • Fix 12 bits sources playback with Direct3D11
    • Fix crash on iOS
    • Fix midstream aspect-ratio changes when Windows hardware decoding is on
    • Fix HLG display with Direct3D11
  • Stream Output: Improve Chromecast support with new ChromeCast apps
  • Misc:
    • Update Youtube, Dailymotion, Vimeo, Soundcloud scripts
    • Work around busy looping when playing an invalid item with loop enabled
  • Updated translations.

New package libaom:

  • Initial version 1.0.0
  • A library for AOMedia Video 1 (AV1), an open, royalty-free video coding format designed for video transmissions over the Internet.

This update was imported from the openSUSE:Leap:15.0:Update update project.

Record
openSUSE-SU-2019:2015-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:11502-1 No score

libvlc5-3.0.16-1.5 on GA media

These are all security issues fixed in the libvlc5-3.0.16-1.5 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11502-1
Updated
2026-11-02
OSVUSN-4074-1 No score

vlc vulnerabilities

It was discovered that the VLC CAF demuxer incorrectly handled certain files. If a user were tricked into opening a specially-crafted CAF file, a remote attacker could use this issue to cause VLC to crash, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-19857)

It was discovered that the VLC Matroska demuxer incorrectly handled certain files. If a user were tricked into opening a specially-crafted MKV file, a remote attacker could use this issue to cause VLC to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2019-12874)

It was discovered that the VLC MP4 demuxer incorrectly handled certain files. If a user were tricked into opening a specially-crafted MP4 file, a remote attacker could use this issue to cause VLC to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2019-13602)

It was discovered that the VLC AVI demuxer incorrectly handled certain files. If a user were tricked into opening a specially-crafted AVI file, a remote attacker could use this issue to cause VLC to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2019-5439)

Record
USN-4074-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
vlc
Debian:12
 before 3.0.4-4
3.0.4-4
vlc
Debian:13
 before 3.0.4-4
3.0.4-4
vlc
Debian:14
 before 3.0.4-4
3.0.4-4
vlc
Debian:9
 before 3.0.6-0+deb9u1, plus listed versions
2.2.6-12.2.6-1~deb9u12.2.6-22.2.6-32.2.6-4
Show 44 moreShow less
2.2.6-52.2.6-62.2.7-12.2.7-1~deb8u12.2.7-1~deb9u12.2.8-12.2.8-23.0.0-13.0.0~rc1-13.0.0~rc1~20171206-13.0.0~rc1~20171210-13.0.0~rc1~20171210-23.0.0~rc2-13.0.0~rc2-23.0.0~rc4-13.0.0~rc4-23.0.0~rc4-33.0.0~rc5-13.0.0~rc6-13.0.0~rc7-13.0.0~rc7-23.0.0~rc8-13.0.1-13.0.1-23.0.1-33.0.2-0+deb9u13.0.2-13.0.2-1+0.riscv64.13.0.2-1+0.riscv64.23.0.3-13.0.3-1+0.riscv64.13.0.3-1+b1+0.riscv64.13.0.3-1-0+deb9u13.0.3-1-13.0.3-1-23.0.3-1-33.0.3-1-43.0.3-23.0.4-13.0.4-23.0.4-33.0.4-43.0.5-13.0.5-2
3.0.6-0+deb9u1
vlc
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
2.2.1-32.2.1-52.2.2-12.2.2-22.2.2-3
Show 11 moreShow less
2.2.2-3build12.2.2-42.2.2-52.2.2-5ubuntu0.16.04.12.2.2-5ubuntu0.16.04.22.2.2-5ubuntu0.16.04.32.2.2-5ubuntu0.16.04.42.2.2-5ubuntu0.16.04.5+esm12.2.2-5ubuntu0.16.04.5+esm22.2.2-5ubuntu0.16.04.5+esm32.2.2-5ubuntu0.16.04.5+esm4
 None known
vlc
Ubuntu:18.04:LTS
 before 3.0.7.1-0ubuntu18.04.1, plus listed versions
2.2.6-62.2.6-6build12.2.7-12.2.8-12.2.8-1ubuntu4
Show 18 moreShow less
2.2.8-23.0.0~rc1-1ubuntu13.0.0~rc1-1ubuntu33.0.0~rc2-1ubuntu13.0.0~rc2-2ubuntu13.0.0~rc2-2ubuntu23.0.0~rc4-1ubuntu13.0.0~rc7-2ubuntu13.0.0~rc8-1ubuntu13.0.0-1ubuntu13.0.1-1ubuntu53.0.1-2ubuntu13.0.1-2ubuntu23.0.1-33.0.1-3build13.0.2-0ubuntu0.13.0.3-1-1ubuntu13.0.4-1ubuntu0.2
3.0.7.1-0ubuntu18.04.1
vlc
openSUSE:Leap 15.1
 before 3.0.7.1-lp151.6.3.1
3.0.7.1-lp151.6.3.1
vlc
SUSE:Package Hub 15 SP1
 before 3.0.7.1-bp151.5.3.3
3.0.7.1-bp151.5.3.3
libaom
openSUSE:Leap 15.0
 before 1.0.0-lp150.2.1
1.0.0-lp150.2.1
vlc
openSUSE:Leap 15.0
 before 3.0.7.1-lp150.8.1
3.0.7.1-lp150.8.1
libaom
SUSE:Package Hub 15
 before 1.0.0-bp150.2.1
1.0.0-bp150.2.1
vlc
SUSE:Package Hub 15
 before 3.0.7.1-bp150.2.6.1
3.0.7.1-bp150.2.6.1
vlc
openSUSE:Tumbleweed
 before 3.0.16-1.5
3.0.16-1.5

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-19857 is a critical vulnerability (CVSS 9.1) in Videolan Vlc Media Player, published December 5, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.92%, the 90th percentile. Fixed in vlc 3.0.4-4.

References

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