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CVE-2020-20891

Buffer Overflow vulnerability in function config_input in libavfilter/vf_gblur.c in Ffmpeg 4.2.1,...

8.8 HighFix available

Buffer Overflow vulnerability in function config_input in libavfilter/vf_gblur.c in Ffmpeg 4.2.1, allows attackers to cause a Denial of Service or other unspecified impacts.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

1.24%Up 0.5 points since Sep 21, 2021
90%50%10%1%

What each source reports

NVD Score used 8.8

Buffer Overflow vulnerability in function config_input in libavfilter/vf_gblur.c in Ffmpeg 4.2.1, allows attackers to cause a Denial of Service or other unspecified impacts.

Record
CVE-2020-20891
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0
6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness
CWE-120
Updated
2026-11-02
CVE List No score

Buffer Overflow vulnerability in function config_input in libavfilter/vf_gblur.c in Ffmpeg 4.2.1, allows attackers to cause a Denial of Service or other unspecified impacts.

Record
CVE-2020-20891
Updated
2026-11-02
EUVDEUVD-2020-13671 No score

Buffer Overflow vulnerability in function config_input in libavfilter/vf_gblur.c in Ffmpeg 4.2.1, allows attackers to cause a Denial of Service or other unspecified impacts.

Record
EUVD-2020-13671
Updated
2026-11-03
GitHub AdvisoriesGHSA-g25m-r8p8-98wq No score

Buffer Overflow vulnerability in function config_input in libavfilter/vf_gblur.c in Ffmpeg 4.2.1,...

Buffer Overflow vulnerability in function config_input in libavfilter/vf_gblur.c in Ffmpeg 4.2.1, allows attackers to cause a Denial of Service or other unspecified impacts.

Record
GHSA-g25m-r8p8-98wq
Weakness
CWE-120
Updated
2026-11-02
OSV 8.8

Buffer Overflow vulnerability in function config_input in libavfilter/vf_gblur.c in Ffmpeg 4.2.1, allows attackers to cause a Denial of Service or other unspecified impacts.

Record
CVE-2020-20891
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2020-20891 8.8

Buffer Overflow vulnerability in function config_input in libavfilter/vf_gblur.c in Ffmpeg 4.2.1, allows attackers to cause a Denial of Service or other unspecified impacts.

Record
DEBIAN-CVE-2020-20891
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
Show 4 moreShow less
OSVUBUNTU-CVE-2020-20891 8.8

Buffer Overflow vulnerability in function config_input in libavfilter/vf_gblur.c in Ffmpeg 4.2.1, allows attackers to cause a Denial of Service or other unspecified impacts.

Record
UBUNTU-CVE-2020-20891
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2021:3521-1 No score

Security update for ffmpeg

This update for ffmpeg fixes the following issues:

  • CVE-2021-3566: Fixed information leak (bsc#1189166).
  • CVE-2021-38093: Fixed integer overflow vulnerability in filter_robert() (bsc#1190734)
  • CVE-2021-38092: Fixed integer overflow vulnerability in filter_prewitt() (bsc#1190733)
  • CVE-2021-38094: Fixed integer overflow vulnerability in filter_sobel() (bsc#1190735)
  • CVE-2020-22037: Fixed denial of service vulnerability caused by memory leak in avcodec_alloc_context3() (bsc#1186756)
  • CVE-2020-35965: Fixed out-of-bounds write in decode_frame() (bsc#1187852)
  • CVE-2020-20892: Fixed an issue with filter_frame() (bsc#1190719)
  • CVE-2020-20891: Fixed a buffer overflow vulnerability in config_input() (bsc#1190718)
  • CVE-2020-20895: Fixed a buffer overflow vulnerability in function filter_vertically_##name (bsc#1190722)
  • CVE-2020-20896: Fixed an issue with latm_write_packet() (bsc#1190723)
  • CVE-2020-20899: Fixed a buffer overflow vulnerability in config_props() (bsc#1190726)
  • CVE-2020-20902: Fixed an out-of-bounds read vulnerabilit long_term_filter() (bsc#1190729)
Record
openSUSE-SU-2021:3521-1
Updated
2026-11-02
OSVSUSE-SU-2021:3521-1 No score

Security update for ffmpeg

This update for ffmpeg fixes the following issues:

  • CVE-2021-3566: Fixed information leak (bsc#1189166).
  • CVE-2021-38093: Fixed integer overflow vulnerability in filter_robert() (bsc#1190734)
  • CVE-2021-38092: Fixed integer overflow vulnerability in filter_prewitt() (bsc#1190733)
  • CVE-2021-38094: Fixed integer overflow vulnerability in filter_sobel() (bsc#1190735)
  • CVE-2020-22037: Fixed denial of service vulnerability caused by memory leak in avcodec_alloc_context3() (bsc#1186756)
  • CVE-2020-35965: Fixed out-of-bounds write in decode_frame() (bsc#1187852)
  • CVE-2020-20892: Fixed an issue with filter_frame() (bsc#1190719)
  • CVE-2020-20891: Fixed a buffer overflow vulnerability in config_input() (bsc#1190718)
  • CVE-2020-20895: Fixed a buffer overflow vulnerability in function filter_vertically_##name (bsc#1190722)
  • CVE-2020-20896: Fixed an issue with latm_write_packet() (bsc#1190723)
  • CVE-2020-20899: Fixed a buffer overflow vulnerability in config_props() (bsc#1190726)
  • CVE-2020-20902: Fixed an out-of-bounds read vulnerabilit long_term_filter() (bsc#1190729)
Record
SUSE-SU-2021:3521-1
Updated
2026-11-02
OSVSUSE-SU-2023:0005-1 No score

Security update for ffmpeg

This update for ffmpeg fixes the following issues:

  • CVE-2022-3109: Fixed null pointer dereference in vp3_decode_frame() (bsc#1206442).
  • CVE-2020-22042: Fixed a denial of service vulnerability led by a memory leak in the link_filter_inouts function in libavfilter/graphparser.c. (bsc#1186761)
  • CVE-2021-38094: Fixed an integer overflow vulnerability in function filter_sobel in libavfilter/vf_convolution.c (bsc#1190735).
  • CVE-2021-38093: Fixed an integer Overflow vulnerability in function filter_robert in libavfilter/vf_convolution.c (bsc#1190734).
  • CVE-2021-38092: Fixed an Integer Overflow vulnerability in function filter_prewitt in libavfilter/vf_convolution.c (bsc#1190733).
  • CVE-2020-22037: Fixed a denial of service vulnerability due to a memory leak in avcodec_alloc_context3 at options.c (bsc#1186756).
  • CVE-2021-3566: Fixed an exposure of sensitive information on ffmpeg version prior to 4.3 (bsc#1189166).
  • CVE-2020-35965: Fixed an out-of-bounds write in decode_frame in libavcodec/exr.c (bsc#1187852).
  • CVE-2020-20892: Fixed a division by zero in function filter_frame in libavfilter/vf_lenscorrection.c (bsc#1190719).
  • CVE-2020-20891: Fixed a buffer overflow vulnerability in function config_input in libavfilter/vf_gblur.c (bsc#1190718).
  • CVE-2020-20895: Fixed a buffer overflow vulnerability in function filter_vertically_##name in libavfilter/vf_avgblur.c (bsc#1190722).
  • CVE-2020-20896: Fixed a NULL pointer dereference in function latm_write_packet in libavformat/latmenc.c (bsc#1190723).
  • CVE-2020-20899: Fixed a buffer overflow vulnerability in function config_props in libavfilter/vf_bwdif.c (bsc#1190726).
  • CVE-2020-20902: Fixed an out-of-bounds read vulnerability in long_term_filter function in g729postfilter.c (bsc#1190729).
Record
SUSE-SU-2023:0005-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
ffmpeg
Debian:12
 before 7:4.3-2
7:4.3-2
ffmpeg
Debian:13
 before 7:4.3-2
7:4.3-2
ffmpeg
Debian:14
 before 7:4.3-2
7:4.3-2
ffmpeg
Debian:9
 before 7:3.2.18-0+deb9u1, plus listed versions
7:3.2.10-1~deb9u17:3.2.10-1~deb9u1~bpo8+17:3.2.11-1~deb9u17:3.2.12-1~deb9u17:3.2.14-1~deb9u1
Show 10 moreShow less
7:3.2.15-0+deb9u17:3.2.15-0+deb9u27:3.2.15-0+deb9u37:3.2.15-0+deb9u47:3.2.16-1+deb9u17:3.2.5-17:3.2.6-17:3.2.7-1~deb9u17:3.2.8-1~deb9u17:3.2.9-1~deb9u1
7:3.2.18-0+deb9u1
ffmpeg
Debian:10
 before 7:4.1.9-0+deb10u1, plus listed versions
7:4.1.3-17:4.1.4-17:4.1.4-1~deb10u17:4.1.6-1~deb10u17:4.1.8-0+deb10u1
7:4.1.9-0+deb10u1
ffmpeg
SUSE:Linux Enterprise Module for Desktop Applications 15 SP2
 before 3.4.2-11.17.1
3.4.2-11.17.1
ffmpeg
SUSE:Linux Enterprise Module for Desktop Applications 15 SP3
 before 3.4.2-11.17.1
3.4.2-11.17.1
ffmpeg
SUSE:Linux Enterprise Module for Package Hub 15 SP2
 before 3.4.2-11.17.1
3.4.2-11.17.1
ffmpeg
SUSE:Linux Enterprise Module for Package Hub 15 SP3
 before 3.4.2-11.17.1
3.4.2-11.17.1
ffmpeg
SUSE:Linux Enterprise Workstation Extension 15 SP2
 before 3.4.2-11.17.1
3.4.2-11.17.1
Show 12 moreShow less
Affected packages
PackageAffectedFixed
ffmpeg
SUSE:Linux Enterprise Workstation Extension 15 SP3
 before 3.4.2-11.17.1
3.4.2-11.17.1
ffmpeg
SUSE:Linux Enterprise High Performance Computing 15-ESPOS
 before 3.4.2-150000.4.44.1
3.4.2-150000.4.44.1
ffmpeg
SUSE:Linux Enterprise High Performance Computing 15-LTSS
 before 3.4.2-150000.4.44.1
3.4.2-150000.4.44.1
ffmpeg
SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS
 before 3.4.2-150000.4.44.1
3.4.2-150000.4.44.1
ffmpeg
SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS
 before 3.4.2-150000.4.44.1
3.4.2-150000.4.44.1
ffmpeg
SUSE:Linux Enterprise Server 15-LTSS
 before 3.4.2-150000.4.44.1
3.4.2-150000.4.44.1
ffmpeg
SUSE:Linux Enterprise Server 15 SP1-BCL
 before 3.4.2-150000.4.44.1
3.4.2-150000.4.44.1
ffmpeg
SUSE:Linux Enterprise Server 15 SP1-LTSS
 before 3.4.2-150000.4.44.1
3.4.2-150000.4.44.1
ffmpeg
SUSE:Linux Enterprise Server for SAP Applications 15
 before 3.4.2-150000.4.44.1
3.4.2-150000.4.44.1
ffmpeg
SUSE:Linux Enterprise Server for SAP Applications 15 SP1
 before 3.4.2-150000.4.44.1
3.4.2-150000.4.44.1
ffmpeg
SUSE:Enterprise Storage 6
 before 3.4.2-150000.4.44.1
3.4.2-150000.4.44.1
ffmpeg
openSUSE:Leap 15.3
 before 3.4.2-11.17.1
3.4.2-11.17.1

History

History
RecordedChangedSources
affected
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-20891 is a high vulnerability (CVSS 8.8) in Ffmpeg, published September 20, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.24%, the 69th percentile. Fixed in ffmpeg 7:4.3-2.

References

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