8.8

CVE-2020-20896: ffmpeg NULL Pointer Dereference

CVSS: 8.8v3.1HighModified
AliasesUBUNTU-CVE-2020-20896DEBIAN-CVE-2020-20896
Published 20-09-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-20896 is a high (CVSS 8.8) NULL Pointer Dereference vulnerability in ffmpeg. EPSS estimates a 1.16% chance of exploitation in the next 30 days, higher than 66.5% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
45/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (NVD)
EPSS score
1.16%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 4 · Related 3
DSA-5126-1OPENSUSE-SU-2021:3521-1SUSE-SU-2021:3521-1SUSE-SU-2023:0005-1

Timeline

  1. 20-09-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

An issue was discovered in function latm_write_packet in libavformat/latmenc.c in Ffmpeg 4.2.1, allows attackers to cause a Denial of Service or other unspecified impacts due to a Null pointer dereference.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.16%

Chance of exploitation in the next 30 days

Percentile

67%

Versus all other CVEs

30-day change

+0.01 pp

From 1.15% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.16%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (trac.ffmpeg.org)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • ffmpeg< 7:4.3-2
Ffmpeg1 product
Ubuntu1 product
  • qtwebengine-opensource-srcAll versions (No fix recorded)

3 vendors · 3 products

References

5 links