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CVE-2020-20448

FFmpeg 4.1.3 is affected by a Divide By Zero issue via libavcodec/ratecontrol.c, which allows a...

6.5 MediumFix available

FFmpeg 4.1.3 is affected by a Divide By Zero issue via libavcodec/ratecontrol.c, which allows a remote malicious user to cause a Denial of Service.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.92%Up 0.4 points since May 26, 2021
90%50%10%1%

What each source reports

NVD Score used 6.5

FFmpeg 4.1.3 is affected by a Divide By Zero issue via libavcodec/ratecontrol.c, which allows a remote malicious user to cause a Denial of Service.

Record
CVE-2020-20448
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
4.0 MediumAV:N/AC:L/Au:S/C:N/I:N/A:P
Weakness
CWE-369
Updated
2026-11-02
CVE List No score

FFmpeg 4.1.3 is affected by a Divide By Zero issue via libavcodec/ratecontrol.c, which allows a remote malicious user to cause a Denial of Service.

Record
CVE-2020-20448
Updated
2026-11-02
EUVDEUVD-2020-13235 No score

FFmpeg 4.1.3 is affected by a Divide By Zero issue via libavcodec/ratecontrol.c, which allows a remote malicious user to cause a Denial of Service.

Record
EUVD-2020-13235
Updated
2026-11-03
GitHub AdvisoriesGHSA-rqxg-44wv-f888 No score

FFmpeg 4.1.3 is affected by a Divide By Zero issue via libavcodec/ratecontrol.c, which allows a...

FFmpeg 4.1.3 is affected by a Divide By Zero issue via libavcodec/ratecontrol.c, which allows a remote malicious user to cause a Denial of Service.

Record
GHSA-rqxg-44wv-f888
Weakness
CWE-369
Updated
2026-11-02
OSV 6.5

FFmpeg 4.1.3 is affected by a Divide By Zero issue via libavcodec/ratecontrol.c, which allows a remote malicious user to cause a Denial of Service.

Record
CVE-2020-20448
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-07
OSVDEBIAN-CVE-2020-20448 6.5

FFmpeg 4.1.3 is affected by a Divide By Zero issue via libavcodec/ratecontrol.c, which allows a remote malicious user to cause a Denial of Service.

Record
DEBIAN-CVE-2020-20448
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2021:2322-1 No score

Security update for ffmpeg

This update for ffmpeg fixes the following issues:

  • CVE-2020-13904: Fixed use-after-free via a crafted EXTINF duration in an m3u8 file (bsc#1172640).
  • CVE-2020-21041: Fixed buffer overflow vulnerability via apng_do_inverse_blend in libavcodec/pngenc.c (bsc#1186406).
  • CVE-2019-17539: Fixed NULL pointer dereference in avcodec_open2 in libavcodec/utils.c (bsc# 1154065).
  • CVE-2020-22026: Fixed buffer overflow vulnerability in config_input() at libavfilter/af_tremolo.c (bsc#1186583).
  • CVE-2020-22021: Fixed buffer overflow vulnerability in filter_edges function in libavfilter/vf_yadif.c (bsc#1186586).
  • CVE-2020-22020: Fixed buffer overflow vulnerability in build_diff_map() in libavfilter/vf_fieldmatch.c (bsc#1186587).
  • CVE-2020-22015: Fixed buffer overflow vulnerability in mov_write_video_tag() due to the out of bounds in libavformat/movenc.c (bsc#1186596).
  • CVE-2020-22016: Fixed a heap-based Buffer Overflow vulnerability at libavcodec/get_bits.h when writing .mov files (bsc#1186598).
  • CVE-2020-22017: Fixed a heap-based Buffer Overflow vulnerability in ff_fill_rectangle() in libavfilter/drawutils.c (bsc#1186600).
  • CVE-2020-22022: Fixed a heap-based Buffer Overflow vulnerability in filter_frame at libavfilter/vf_fieldorder.c (bsc#1186603).
  • CVE-2020-22023: Fixed a heap-based Buffer Overflow vulnerability in filter_frame at libavfilter/vf_bitplanenoise.c (bsc#1186604)
  • CVE-2020-22025: Fixed a heap-based Buffer Overflow vulnerability in gaussian_blur at libavfilter/vf_edgedetect.c (bsc#1186605).
  • CVE-2020-22031: Fixed a heap-based Buffer Overflow vulnerability at libavfilter/vf_w3fdif.c in filter16_complex_low() (bsc#1186613).
  • CVE-2020-22032: Fixed a heap-based Buffer Overflow vulnerability at libavfilter/vf_edgedetect.c in gaussian_blur() (bsc#1186614).
  • CVE-2020-22034: Fixed a heap-based Buffer Overflow vulnerability at libavfilter/vf_floodfill.c (bsc#1186616).
  • CVE-2020-20451: Fixed denial of service issue due to resource management errors via fftools/cmdutils.c (bsc#1186658).
  • CVE-2020-20448: Fixed divide by zero issue via libavcodec/ratecontrol.c (bsc#1186660).
  • CVE-2020-22038: Fixed denial of service vulnerability due to a memory leak in the ff_v4l2_m2m_create_context function in v4l2_m2m.c (bsc#1186757).
  • CVE-2020-22039: Fixed denial of service vulnerability due to a memory leak in the inavi_add_ientry function (bsc#1186758).
  • CVE-2020-22043: Fixed denial of service vulnerability due to a memory leak at the fifo_alloc_common function in libavutil/fifo.c (bsc#1186762).
  • CVE-2020-22044: Fixed denial of service vulnerability due to a memory leak in the url_open_dyn_buf_internal function in libavformat/aviobuf.c (bsc#1186763).
  • CVE-2020-22033,CVE-2020-22019: Fixed a heap-based Buffer Overflow Vulnerability at libavfilter/vf_vmafmotion.c in convolution_y_8bit() and in convolution_y_10bit() in libavfilter/vf_vmafmotion.c (bsc#1186615, bsc#1186597).
Record
openSUSE-SU-2021:2322-1
Updated
2026-11-02
OSVSUSE-SU-2021:2322-1 No score

Security update for ffmpeg

This update for ffmpeg fixes the following issues:

  • CVE-2020-13904: Fixed use-after-free via a crafted EXTINF duration in an m3u8 file (bsc#1172640).
  • CVE-2020-21041: Fixed buffer overflow vulnerability via apng_do_inverse_blend in libavcodec/pngenc.c (bsc#1186406).
  • CVE-2019-17539: Fixed NULL pointer dereference in avcodec_open2 in libavcodec/utils.c (bsc# 1154065).
  • CVE-2020-22026: Fixed buffer overflow vulnerability in config_input() at libavfilter/af_tremolo.c (bsc#1186583).
  • CVE-2020-22021: Fixed buffer overflow vulnerability in filter_edges function in libavfilter/vf_yadif.c (bsc#1186586).
  • CVE-2020-22020: Fixed buffer overflow vulnerability in build_diff_map() in libavfilter/vf_fieldmatch.c (bsc#1186587).
  • CVE-2020-22015: Fixed buffer overflow vulnerability in mov_write_video_tag() due to the out of bounds in libavformat/movenc.c (bsc#1186596).
  • CVE-2020-22016: Fixed a heap-based Buffer Overflow vulnerability at libavcodec/get_bits.h when writing .mov files (bsc#1186598).
  • CVE-2020-22017: Fixed a heap-based Buffer Overflow vulnerability in ff_fill_rectangle() in libavfilter/drawutils.c (bsc#1186600).
  • CVE-2020-22022: Fixed a heap-based Buffer Overflow vulnerability in filter_frame at libavfilter/vf_fieldorder.c (bsc#1186603).
  • CVE-2020-22023: Fixed a heap-based Buffer Overflow vulnerability in filter_frame at libavfilter/vf_bitplanenoise.c (bsc#1186604)
  • CVE-2020-22025: Fixed a heap-based Buffer Overflow vulnerability in gaussian_blur at libavfilter/vf_edgedetect.c (bsc#1186605).
  • CVE-2020-22031: Fixed a heap-based Buffer Overflow vulnerability at libavfilter/vf_w3fdif.c in filter16_complex_low() (bsc#1186613).
  • CVE-2020-22032: Fixed a heap-based Buffer Overflow vulnerability at libavfilter/vf_edgedetect.c in gaussian_blur() (bsc#1186614).
  • CVE-2020-22034: Fixed a heap-based Buffer Overflow vulnerability at libavfilter/vf_floodfill.c (bsc#1186616).
  • CVE-2020-20451: Fixed denial of service issue due to resource management errors via fftools/cmdutils.c (bsc#1186658).
  • CVE-2020-20448: Fixed divide by zero issue via libavcodec/ratecontrol.c (bsc#1186660).
  • CVE-2020-22038: Fixed denial of service vulnerability due to a memory leak in the ff_v4l2_m2m_create_context function in v4l2_m2m.c (bsc#1186757).
  • CVE-2020-22039: Fixed denial of service vulnerability due to a memory leak in the inavi_add_ientry function (bsc#1186758).
  • CVE-2020-22043: Fixed denial of service vulnerability due to a memory leak at the fifo_alloc_common function in libavutil/fifo.c (bsc#1186762).
  • CVE-2020-22044: Fixed denial of service vulnerability due to a memory leak in the url_open_dyn_buf_internal function in libavformat/aviobuf.c (bsc#1186763).
  • CVE-2020-22033,CVE-2020-22019: Fixed a heap-based Buffer Overflow Vulnerability at libavfilter/vf_vmafmotion.c in convolution_y_8bit() and in convolution_y_10bit() in libavfilter/vf_vmafmotion.c (bsc#1186615, bsc#1186597).
Record
SUSE-SU-2021:2322-1
Updated
2026-11-02
OSVSUSE-SU-2021:2929-1 No score

Security update for ffmpeg

This update for ffmpeg fixes the following issues:

  • CVE-2019-9721: Fixed a denial of service in the subtitle decoder in handle_open_brace from libavcodec/htmlsubtitles.c (bsc#1129714).
  • CVE-2020-22046: Fixed a denial of service vulnerability due to a memory leak in the avpriv_float_dsp_allocl function in libavutil/float_dsp.c (bsc#1186849).
  • CVE-2020-22048: Fixed a denial of service vulnerability due to a memory leak in the ff_frame_pool_get function in framepool.c (bsc#1186859).
  • CVE-2020-22049: Fixed a denial of service vulnerability caused by a memory leak in the wtvfile_open_sector function in wtvdec.c (bsc#1186861).
  • CVE-2020-22054: Fixed a denial of service vulnerability due to a memory leak in the av_dict_set function in dict.c (bsc#1186863).
  • CVE-2020-13904: Fixed use-after-free via a crafted EXTINF duration in an m3u8 file (bsc#1172640).
  • CVE-2020-21041: Fixed buffer overflow vulnerability via apng_do_inverse_blend in libavcodec/pngenc.c (bsc#1186406).
  • CVE-2019-17539: Fixed NULL pointer dereference in avcodec_open2 in libavcodec/utils.c (bsc# 1154065).
  • CVE-2020-22026: Fixed buffer overflow vulnerability in config_input() at libavfilter/af_tremolo.c (bsc#1186583).
  • CVE-2020-22021: Fixed buffer overflow vulnerability in filter_edges function in libavfilter/vf_yadif.c (bsc#1186586).
  • CVE-2020-22020: Fixed buffer overflow vulnerability in build_diff_map() in libavfilter/vf_fieldmatch.c (bsc#1186587).
  • CVE-2020-22015: Fixed buffer overflow vulnerability in mov_write_video_tag() due to the out of bounds in libavformat/movenc.c (bsc#1186596).
  • CVE-2020-22016: Fixed a heap-based Buffer Overflow vulnerability at libavcodec/get_bits.h when writing .mov files (bsc#1186598).
  • CVE-2020-22017: Fixed a heap-based Buffer Overflow vulnerability in ff_fill_rectangle() in libavfilter/drawutils.c (bsc#1186600).
  • CVE-2020-22022: Fixed a heap-based Buffer Overflow vulnerability in filter_frame at libavfilter/vf_fieldorder.c (bsc#1186603).
  • CVE-2020-22023: Fixed a heap-based Buffer Overflow vulnerability in filter_frame at libavfilter/vf_bitplanenoise.c (bsc#1186604)
  • CVE-2020-22025: Fixed a heap-based Buffer Overflow vulnerability in gaussian_blur at libavfilter/vf_edgedetect.c (bsc#1186605).
  • CVE-2020-22031: Fixed a heap-based Buffer Overflow vulnerability at libavfilter/vf_w3fdif.c in filter16_complex_low() (bsc#1186613).
  • CVE-2020-22032: Fixed a heap-based Buffer Overflow vulnerability at libavfilter/vf_edgedetect.c in gaussian_blur() (bsc#1186614).
  • CVE-2020-22034: Fixed a heap-based Buffer Overflow vulnerability at libavfilter/vf_floodfill.c (bsc#1186616).
  • CVE-2020-20451: Fixed denial of service issue due to resource management errors via fftools/cmdutils.c (bsc#1186658).
  • CVE-2020-20448: Fixed divide by zero issue via libavcodec/ratecontrol.c (bsc#1186660).
  • CVE-2020-22038: Fixed denial of service vulnerability due to a memory leak in the ff_v4l2_m2m_create_context function in v4l2_m2m.c (bsc#1186757).
  • CVE-2020-22039: Fixed denial of service vulnerability due to a memory leak in the inavi_add_ientry function (bsc#1186758).
  • CVE-2020-22043: Fixed denial of service vulnerability due to a memory leak at the fifo_alloc_common function in libavutil/fifo.c (bsc#1186762).
  • CVE-2020-22044: Fixed denial of service vulnerability due to a memory leak in the url_open_dyn_buf_internal function in libavformat/aviobuf.c (bsc#1186763).
  • CVE-2020-22033,CVE-2020-22019: Fixed a heap-based Buffer Overflow Vulnerability at libavfilter/vf_vmafmotion.c in convolution_y_8bit() and in convolution_y_10bit() in libavfilter/vf_vmafmotion.c (bsc#1186615, bsc#1186597).
  • CVE-2020-21688: Fixed a heap-use-after-free in the av_freep function in libavutil/mem.c (bsc#1189348).
  • CVE-2020-21697: Fixed a heap-use-after-free in the mpeg_mux_write_packet function in libavformat/mpegenc.c (bsc#1189350).
  • CVE-2021-38114: Fixed a not checked return value of the init_vlc function (bsc#1189142).
Record
SUSE-SU-2021:2929-1
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:10
From an advisory covering 7 CVEs
 before 7:4.1.6-1~deb10u1, plus listed versions
7:4.1.3-17:4.1.4-17:4.1.4-1~deb10u1
7:4.1.6-1~deb10u1
ffmpeg
SUSE:Linux Enterprise Module for Desktop Applications 15 SP2
From an advisory covering 23 CVEs
 before 3.4.2-11.3.1
3.4.2-11.3.1
ffmpeg
SUSE:Linux Enterprise Module for Desktop Applications 15 SP3
From an advisory covering 23 CVEs
 before 3.4.2-11.3.1
3.4.2-11.3.1
ffmpeg
SUSE:Linux Enterprise Module for Package Hub 15 SP2
From an advisory covering 23 CVEs
 before 3.4.2-11.3.1
3.4.2-11.3.1
ffmpeg
SUSE:Linux Enterprise Module for Package Hub 15 SP3
From an advisory covering 23 CVEs
 before 3.4.2-11.3.1
3.4.2-11.3.1
ffmpeg
SUSE:Linux Enterprise Workstation Extension 15 SP2
From an advisory covering 23 CVEs
 before 3.4.2-11.3.1
3.4.2-11.3.1
ffmpeg
SUSE:Linux Enterprise Workstation Extension 15 SP3
From an advisory covering 23 CVEs
 before 3.4.2-11.3.1
3.4.2-11.3.1
Show 14 moreShow less
Affected packages
PackageAffectedFixed
ffmpeg
SUSE:Linux Enterprise High Performance Computing 15-ESPOS
From an advisory covering 31 CVEs
 before 3.4.2-4.34.2
3.4.2-4.34.2
ffmpeg
SUSE:Linux Enterprise High Performance Computing 15-LTSS
From an advisory covering 31 CVEs
 before 3.4.2-4.34.2
3.4.2-4.34.2
ffmpeg
SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS
From an advisory covering 31 CVEs
 before 3.4.2-4.34.2
3.4.2-4.34.2
ffmpeg
SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS
From an advisory covering 31 CVEs
 before 3.4.2-4.34.2
3.4.2-4.34.2
ffmpeg
SUSE:Linux Enterprise Server 15-LTSS
From an advisory covering 31 CVEs
 before 3.4.2-4.34.2
3.4.2-4.34.2
ffmpeg
SUSE:Linux Enterprise Server 15 SP1-BCL
From an advisory covering 31 CVEs
 before 3.4.2-4.34.2
3.4.2-4.34.2
ffmpeg
SUSE:Linux Enterprise Server 15 SP1-LTSS
From an advisory covering 31 CVEs
 before 3.4.2-4.34.2
3.4.2-4.34.2
ffmpeg
SUSE:Linux Enterprise Server for SAP Applications 15
From an advisory covering 31 CVEs
 before 3.4.2-4.34.2
3.4.2-4.34.2
ffmpeg
SUSE:Linux Enterprise Server for SAP Applications 15 SP1
From an advisory covering 31 CVEs
 before 3.4.2-4.34.2
3.4.2-4.34.2
ffmpeg
SUSE:Manager Proxy 4.0
From an advisory covering 31 CVEs
 before 3.4.2-4.34.2
3.4.2-4.34.2
ffmpeg
SUSE:Manager Retail Branch Server 4.0
From an advisory covering 31 CVEs
 before 3.4.2-4.34.2
3.4.2-4.34.2
ffmpeg
SUSE:Manager Server 4.0
From an advisory covering 31 CVEs
 before 3.4.2-4.34.2
3.4.2-4.34.2
ffmpeg
SUSE:Enterprise Storage 6
From an advisory covering 31 CVEs
 before 3.4.2-4.34.2
3.4.2-4.34.2
ffmpeg
openSUSE:Leap 15.3
From an advisory covering 23 CVEs
 before 3.4.2-11.3.1
3.4.2-11.3.1

History

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

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

In short

CVE-2020-20448 is a medium vulnerability (CVSS 6.5) in Ffmpeg, published July 8, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.92%, the 60th percentile. Fixed in ffmpeg 7:4.3-2.

References

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