7.5

CVE-2015-6821: ffmpeg Improper Input Validation

CVSS: 7.5v2.0HighModified
AliasesUBUNTU-CVE-2015-6821DEBIAN-CVE-2015-6821CGA-29vc-525p-7jrc
Published 06-09-2015Last modified 06-08-2024
Open JSON

Vulnerability summary

CVE-2015-6821 is a high (CVSS 7.5) Improper Input Validation vulnerability in ffmpeg. EPSS estimates a 2.41% chance of exploitation in the next 30 days, higher than 83.8% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v2.0 (NVD)
EPSS score
2.41%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2
DLA-1611-1MGASA-2016-0018

Timeline

  1. 06-09-2015
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

The ff_mpv_common_init function in libavcodec/mpegvideo.c in FFmpeg before 2.7.2 does not properly maintain the encoding context, which allows remote attackers to cause a denial of service (invalid pointer access) or possibly have unspecified other impact via crafted MPEG data.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

2.41%

Chance of exploitation in the next 30 days

Percentile

84%

Versus all other CVEs

30-day change

0.00 pp

From 2.41% on 18-09-2026

18-09-202618-10-2026
EPSS score
2.41%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard4 products
  • torchaudio-ffmpeg-tarballsAll versions (No fix recorded)
  • torchaudio-ffmpeg-tarballs-4.4.4All versions (No fix recorded)
  • torchaudio-ffmpeg-tarballs-5.0.3All versions (No fix recorded)
  • torchaudio-ffmpeg-tarballs-6.0All versions (No fix recorded)
Debian1 product
  • ffmpeg< 7:2.7.2-1
Ffmpeg1 product
Ubuntu1 product
  • libavAll versions (No fix recorded)

4 vendors · 7 products

References

7 links