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Vulnerabilities

Vulnerability · CVE-2018-19857

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, bec…

Published Dec 5, 2018 · catalog updated Oct 15, 2026 · vlc media player

Check if you run it

No confirmed exploitation is on record for CVE-2018-19857. EPSS is 3.92%. Act only if a listed version of vlc media player is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
3.92%
Remediation
Advisory link
Affected products
cpe debian/debian linux · cpe 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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe debian/debian linux9.0
  • cpe videolan/vlc media player3.0.4

How to fix CVE-2018-19857

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2018-19857. EPSS is 3.92%. Act only if a listed version of vlc media player is installed.

Which versions are affected?

Compare what you have installed with debian/debian linux 9.0; videolan/vlc media player 3.0.4. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-824: Access of Uninitialized Pointer. EPSS 3.92%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 5, 2018 · NIST NVD

    Detected

    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.

  2. Jun 17, 2026 · NIST NVD

    Updated

    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.

  3. Oct 15, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2018-19857

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2018-19857

    30-day exploitation probability 3.92%

    first.org
  • NIST NVDVulnerability recordCVE-2018-19857

    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

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 24, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.