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CVE-2018-6621

23
FAUCET Score

CVE-2018-6621 is a denial-of-service vulnerability affecting FFmpeg through version 3.2, specifically within the decode_frame function in libavcodec/utvideodec.c, and impacting Debian Linux distributions. This medium-severity vulnerability (CVSS 6.5) can be triggered remotely by an unauthenticated attacker through a crafted AVI file, leading to an out-of-array read. While the attack complexity is low, user interaction is required, and the primary impact is a denial of service. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.2CPE matchmatch criteria
cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.16%
Probability of exploitation in next 30 days
EPSS Percentile
80.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0216 is in the 90th percentile among its peer group of 26,221 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

git.ffmpeg.org / gitweb/ffmpeg.git/commit/118e1b0b3370dd1c0da442901b486689efd1654b
PatchThird Party Advisory
github.com / FFmpeg/FFmpeg/commit/22aa37c0fedf14531783189a197542a055959b6c
PatchThird Party Advisory
lists.debian.org / debian-lts-announce/2019/01/msg00006.html
Mailing ListThird Party Advisory
debian.org / security/2018/dsa-4249
Third Party Advisory
securityfocus.com / bid/102950
Third Party AdvisoryVDB Entry