6.5

CVE-2019-9721: canonical ubuntu_linux Out-of-bounds Read

CVSS: 6.5v3.1MediumModified
AliasesUBUNTU-CVE-2019-9721DEBIAN-CVE-2019-9721
Published 12-03-2019Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2019-9721 is a medium (CVSS 6.5) Out-of-bounds Read vulnerability in canonical ubuntu_linux. EPSS estimates a 1.44% chance of exploitation in the next 30 days, higher than 72.7% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
1.44%
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 4 · Related 4
OPENSUSE-SU-2021:2919-1SUSE-SU-2021:2919-1SUSE-SU-2021:2929-1USN-3967-1

Timeline

  1. 12-03-2019
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

A denial of service in the subtitle decoder in FFmpeg 3.2 and 4.1 allows attackers to hog the CPU via a crafted video file in Matroska format, because handle_open_brace in libavcodec/htmlsubtitles.c has a complex format argument to sscanf.

CVSS metrics

5 scores · 3 sources · 3 versions

EPSS trend

Probability

1.44%

Chance of exploitation in the next 30 days

Percentile

73%

Versus all other CVEs

30-day change

0.00 pp

From 1.44% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.44%

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

Canonical1 product
Debian1 product
  • ffmpeg< 7:4.1.3-1
Ffmpeg1 product
Ubuntu1 product
  • ffmpeg< 7:3.4.6-0ubuntu0.18.04.1

4 vendors · 4 products

References

8 links