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Vulnerability record · CVE-2018-19857 · published 5 December 2018

CVE-2018-19857: Videolan vlc media player vulnerability

Videolan · Vlc Media Player

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.

9.1 CVSS 3.0 Critical EPSS 3.9% · top 9.8% CWE-824 · CWE-824
9.1CVSS 3.0 base score, v2 6.4
3.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
18References, 2 tagged exploit
15 Oct 2026Last modified by NVD

Description

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.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00005.html
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00037.html
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00040.html
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00081.html
http://www.securityfocus.com/bid/106130 Third Party AdvisoryVDB Entry
https://dyntopia.com/advisories/013-vlc ExploitThird Party Advisory
https://git.videolan.org/?p=vlc.git%3Ba=commit%3Bh=0cc5ea748ee5ff7705dde61ab15dff8f58be39d0
https://usn.ubuntu.com/4074-1/
https://www.debian.org/security/2019/dsa-4366 Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00005.html
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00037.html
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00040.html
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00081.html
http://www.securityfocus.com/bid/106130 Third Party AdvisoryVDB Entry
https://dyntopia.com/advisories/013-vlc ExploitThird Party Advisory
https://git.videolan.org/?p=vlc.git%3Ba=commit%3Bh=0cc5ea748ee5ff7705dde61ab15dff8f58be39d0
https://usn.ubuntu.com/4074-1/
https://www.debian.org/security/2019/dsa-4366 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2018-19857), CISA KEV, FIRST EPSS (scores of 2026-10-16). This page is refreshed as NVD updates the record.