CVE-2019-14778· NVD / CVE Program· CNA mitre

The mkv::virtual_segment_c::seek method of demux/mkv/virtual_segment.cpp in VideoLAN VLC media player 3.0.7.1 has a use-after-free.

Noroxi assessment

Priority: Monitor (action score 31/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 1.4% (FIRST EPSS); higher than 73.3% of all records.
Someone with local access to the system can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
Fixed version: vlc (Debian:10) 3.0.8-0+deb10u1; vlc (Debian:12) 3.0.8-1; vlc (Debian:9) 3.0.8-0+deb9u1.

Low priority for now. Upgrade to vlc (Debian:10) 3.0.8-0+deb10u1; vlc (Debian:12) 3.0.8-1; vlc (Debian:9) 3.0.8-0+deb9u1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

HighCVSS 7.8 · v3.0—No exploit Fix available

Memory safety

Published: Aug 29, 2019
Updated: Jun 16, 2026
EPSS: 1.4% · 73th percentile
CWE: CWE-416

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 31 / 40 · 7.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 1.4%

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
videolan	vlc media player	cpe:2.3:a:videolan:vlc_media_player
debian	debian linux	cpe:2.3:o:debian:debian_linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

debian debian linux10.0
debian debian linux9.0
videolan vlc media player3.0.7.1

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:10	vlc	before 3.0.8-0+deb10u1	3.0.8-0+deb10u1
Debian:12	vlc	before 3.0.8-1	3.0.8-1
Debian:9	vlc	before 3.0.8-0+deb9u1	3.0.8-0+deb9u1
openSUSE:Leap 15.1	vlc	before 3.0.9.2-lp151.6.6.1	3.0.9.2-lp151.6.6.1
SUSE:Package Hub 15 SP1	vlc	before 3.0.9.2-bp151.5.6.1	3.0.9.2-bp151.5.6.1

Same product

videolan: all records

Other highest-scoring records for the same primary product.

CVE-2010-3275libdirectx_plugin.dll in VideoLAN VLC Media Player before 1.1.8 allows remote attackers to execute arbitrary code via a crafted width in an
60This week
CVE-2008-4654Stack-based buffer overflow in the parse_master function in the Ty demux plugin (modules/demux/ty.c) in VLC Media Player 0.9.0 through 0.9.4
54Plan
CVE-2012-1775Stack-based buffer overflow in VideoLAN VLC media player before 2.0.1 allows remote attackers to execute arbitrary code via a crafted MMS://
50Plan

Published before and after this one in the same product

← EarlierCVE-2019-14776Aug 29, 2019 · A heap-based buffer over-read exists in DemuxInit() in demux/asf/asf.c in VideoLAN VLC media player 3.0.7.1 via a crafted .mkv file.
31Monitor
← EarlierCVE-2019-14777Aug 29, 2019 · The Control function of demux/mkv/mkv.cpp in VideoLAN VLC media player 3.0.7.1 has a use-after-free.
31Monitor
Later →CVE-2019-14970Aug 29, 2019 · A vulnerability in mkv::event_thread_t in VideoLAN VLC media player 3.0.7.1 allows remote attackers to trigger a heap-based buffer overflow
32Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
debian:vlc	3.0.8-1 · Debian:12	Package registry (OSV)
opensuse:vlc	3.0.9.2-lp151.6.6.1 · openSUSE:Leap 15.1	Package registry (OSV)
suse:vlc	3.0.9.2-bp151.5.6.1 · SUSE:Package Hub 15 SP1	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Someone with local access to the system can trigger it.
No account or password is required.
A user must open a link or visit a page.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Local
Attack complexity: Low
Privileges required: None
User interaction: Required
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

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

nvd-primary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1free(dev->buf);
2/* ... another thread is still running ... */
3process(dev->buf);

Fixed

1lock(&dev->lock);
2free(dev->buf);
3dev->buf = NULL;
4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

Fix✗ → ✓Sep 28, 2026, 10:46 PM UTC

For records you follow, these changes also arrive as notifications. →

References

git.videolan.org/?p=vlc.git&a=search&h=refs/heads/master&st=commit&s=cve-2019

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records