vlc — security advisory
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.
- Products
- vlc
- Affected versions
- Not specified
- Fixed versions
- 3.0.4-4
- CVEs
- CVE-2018-19857
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 19:15 UTC · Revision 1
Source evidence
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.
osv:DEBIAN-CVE-2018-19857
vlc
Fixed versions: 3.0.4-4
vlc
Fixed versions: 3.0.4-4
vlc
Fixed versions: 3.0.4-4
Complete source record
{
"id": "c4a72a6c76c211058a455d29a96548b6f6de955af9d687671ea6fc7b080f2df0",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2018-19857",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2018-19857",
"summary": "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.",
"evidence": "osv:DEBIAN-CVE-2018-19857",
"products": [
{
"name": {
"value": "vlc",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.0.4-4",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "vlc",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.0.4-4",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "vlc",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.0.4-4",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
}
],
"severity": "critical",
"structured": {
"id": "DEBIAN-CVE-2018-19857",
"aliases": [
"DEBIAN-CVE-2018-19857"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.0.4-4"
}
]
}
],
"package": {
"name": "vlc",
"purl": "pkg:deb/debian/vlc?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-19857.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.0.4-4"
}
]
}
],
"package": {
"name": "vlc",
"purl": "pkg:deb/debian/vlc?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-19857.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.0.4-4"
}
]
}
],
"package": {
"name": "vlc",
"purl": "pkg:deb/debian/vlc?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-19857.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-15T21:47:43.420873921Z",
"provider": "osv",
"upstream": [
"CVE-2018-19857"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2018-19857"
]
},
"related_cves": [
{
"value": "CVE-2018-19857",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 336147,
"published_at": "2018-12-05T11:29:05.827+00:00"
}