CVE-2018-19857: debian debian_linux Access of Uninitialized Pointer
Vulnerability summary
CVE-2018-19857 is a critical (CVSS 9.1) Access of Uninitialized Pointer vulnerability in debian debian_linux. EPSS estimates a 3.92% chance of exploitation in the next 30 days, higher than 90.2% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 6 · Related 6Timeline
- 05-12-2018PublishedVulnerability first disclosed.
- 15-10-2026Last modifiedVulnerability information updated.
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 metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated9.1CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated9.1CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
EPSS trend
Probability
3.92%
Chance of exploitation in the next 30 days
Percentile
90%
Versus all other CVEs
30-day change
0.00 pp
From 3.92% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (dyntopia.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Debian2 products
- vlc< 3.0.6-0+deb9u1 | < 3.0.4-4
- debian_linuxEOL9.0
Ubuntu1 product
- vlcAll versions (No fix recorded) | < 3.0.7.1-0ubuntu18.04.1
Videolan1 product
- vlc_media_player3.0.4
3 vendors · 4 products
