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CVE-2021-38291

FFmpeg version (git commit de8e6e67e7523e48bb27ac224a0b446df05e1640) suffers from a an assertion...

7.5 HighFix available

FFmpeg version (git commit de8e6e67e7523e48bb27ac224a0b446df05e1640) suffers from a an assertion failure at src/libavutil/mathematics.c.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

2.69%Up 2.3 points since Aug 13, 2021
90%50%10%1%

What each source reports

NVD Score used 7.5

FFmpeg version (git commit de8e6e67e7523e48bb27ac224a0b446df05e1640) suffers from a an assertion failure at src/libavutil/mathematics.c.

Record
CVE-2021-38291
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-617
Updated
2026-11-02
CVE List No score

FFmpeg version (git commit de8e6e67e7523e48bb27ac224a0b446df05e1640) suffers from a an assertion failure at src/libavutil/mathematics.c.

Record
CVE-2021-38291
Updated
2026-11-02
EUVDEUVD-2021-24749 No score

FFmpeg version (git commit de8e6e67e7523e48bb27ac224a0b446df05e1640) suffers from a an assertion failure at src/libavutil/mathematics.c.

Record
EUVD-2021-24749
Updated
2026-11-03
GitHub AdvisoriesGHSA-4525-66vv-3hwf 7.5

FFmpeg version (git commit de8e6e67e7523e48bb27ac224a0b446df05e1640) suffers from a an assertion...

FFmpeg version (git commit de8e6e67e7523e48bb27ac224a0b446df05e1640) suffers from a an assertion failure at src/libavutil/mathematics.c.

Record
GHSA-4525-66vv-3hwf
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-617
Updated
2026-11-02
OSVALPINE-CVE-2021-38291 7.5

FFmpeg version (git commit de8e6e67e7523e48bb27ac224a0b446df05e1640) suffers from a an assertion failure at src/libavutil/mathematics.c.

Record
ALPINE-CVE-2021-38291
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-03
OSV 7.5

FFmpeg version (git commit de8e6e67e7523e48bb27ac224a0b446df05e1640) suffers from a an assertion failure at src/libavutil/mathematics.c.

Record
CVE-2021-38291
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-07
Show 7 moreShow less
OSVDEBIAN-CVE-2021-38291 7.5

FFmpeg version (git commit de8e6e67e7523e48bb27ac224a0b446df05e1640) suffers from a an assertion failure at src/libavutil/mathematics.c.

Record
DEBIAN-CVE-2021-38291
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVJLSEC-2025-117 7.5

FFmpeg version (git commit de8e6e67e7523e48bb27ac224a0b446df05e1640) suffers from a an assertion...

FFmpeg version (git commit de8e6e67e7523e48bb27ac224a0b446df05e1640) suffers from a an assertion failure at src/libavutil/mathematics.c.

Record
JLSEC-2025-117
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Updated
2026-11-02
OSVUBUNTU-CVE-2021-38291 7.5

FFmpeg version (git commit de8e6e67e7523e48bb27ac224a0b446df05e1640) suffers from a an assertion failure at src/libavutil/mathematics.c.

Record
UBUNTU-CVE-2021-38291
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVMGASA-2021-0495 No score

Updated ffmpeg packages fix security vulnerability

FFmpeg 4.2 is affected by a Divide By Zero issue via libavcodec/aacpsy.c, which allows a remote malicious user to cause a Denial of Service. (CVE-2020-20446)

FFmpeg 4.2 is affected by null pointer dereference passed as argument to libavformat/aviobuf.c, which could cause a Denial of Service. (CVE-2020-20450)

FFmpeg 4.2 is affected by a Divide By Zero issue via libavcodec/aaccoder, which allows a remote malicious user to cause a Denial of Service. (CVE-2020-20453)

Buffer Overflow vulnerability exists in FFmpeg 4.1 via apng_do_inverse_blend in libavcodec/pngenc.c, which could let a remote malicious user cause a Denial of Service. (CVE-2020-21041)

Buffer Overflow vulnerability in FFmpeg 4.2 in mov_write_video_tag due to the out of bounds in libavformat/movenc.c, which could let a remote malicious user obtain sensitive information, cause a Denial of Service, or execute arbitrary code. (CVE-2020-22015)

Buffer Overflow vulnerability in FFmpeg 4.2 at convolution_y_10bit in libavfilter/vf_vmafmotion.c, which could let a remote malicious user cause a Denial of Service. (CVE-2020-22019)

Buffer Overflow vulnerability in FFmpeg 4.2 at filter_edges function in libavfilter/vf_yadif.c, which could let a remote malicious user cause a Denial of Service. (CVE-2020-22021)

A heap-based Buffer Overflow Vulnerability exists FFmpeg 4.2 at libavfilter/vf_vmafmotion.c in convolution_y_8bit, which could let a remote malicious user cause a Denial of Service. (CVE-2020-22033)

A Denial of Service vulnerability exists in FFmpeg 4.2 due to a memory leak in avcodec_alloc_context3 at options.c. (CVE-2020-22037)

A Denial of Service vulnerability exists in FFmpeg 4.2 due to a memory leak in the ff_v4l2_m2m_create_context function in v4l2_m2m.c. (CVE-2020-22038)

A Denial of Service vulnerability exists in FFmpeg 4.2 due to a memory leak is affected by: memory leak in the link_filter_inouts function in libavfilter/graphparser.c. (CVE-2020-22042)

libavcodec/dnxhddec.c in FFmpeg 4.4 does not check the return value of the init_vlc function, a similar issue to CVE-2013-0868. (CVE-2021-38114)

adts_decode_extradata in libavformat/adtsenc.c in FFmpeg 4.4 does not check the init_get_bits return value, which is a necessary step because the second argument to init_get_bits can be crafted. (CVE-2021-38171)

FFmpeg version (git commit de8e6e67e7523e48bb27ac224a0b446df05e1640) suffers from a an assertion failure at src/libavutil/mathematics.c. (CVE-2021-38291)

Record
MGASA-2021-0495
Updated
2026-11-02
OSVSUSE-SU-2024:3114-1 No score

Security update for ffmpeg

This update for ffmpeg fixes the following issues:

  • CVE-2020-22027: Fixed heap-based Buffer Overflow vulnerability exits in deflate16 at libavfilter/vf_neighbor.c (bsc#1186607)
  • CVE-2021-38291: Fixed an assertion failure at src/libavutil/mathematics.c (bsc#1189428)
  • CVE-2023-51798: Fixed floating point exception(FPE) via the interpolate function (bsc#1223304)
Record
SUSE-SU-2024:3114-1
Updated
2026-11-02
OSVUSN-5167-1 No score

ffmpeg vulnerabilities

It was discovered that FFmpeg did not properly verify certain input when processing video and audio files. An attacker could possibly use this to send specially crafted input to the application, force a division by zero, and cause a denial of service (application crash). (CVE-2020-20445, CVE-2020-20446, CVE-2020-20453, CVE-2020-20892)

It was discovered that FFmpeg did not properly perform certain bit shift and memory operations. An attacker could possibly use this issue to expose sensitive information. (CVE-2020-20902)

It was discovered that FFmpeg did not properly perform memory management operations in various of its functions. An attacker could possibly use this issue to send specially crafted input to the application and cause a denial of service (application crash) or execute arbitrary code. (CVE-2020-21041, CVE-2020-20451, CVE-2020-21688, CVE-2020-21697, CVE-2020-22020, CVE-2020-22021, CVE-2020-22022, CVE-2020-22025, CVE-2020-22031, CVE-2020-22032, CVE-2020-22037, CVE-2020-22040, CVE-2020-22041, CVE-2020-22042, CVE-2020-22044)

It was discovered that FFmpeg did not properly perform memory management operations in various of its functions. An attacker could possibly use this issue to send specially crafted input to the application and cause a denial of service (application crash) or execute arbitrary code. (CVE-2020-22016, CVE-2020-22046, CVE-2020-22049, CVE-2020-22054)

It was discovered that FFmpeg did not properly perform memory management operations in various of its functions. An attacker could possibly use this issue to send specially crafted input to the application and cause a denial of service (application crash) or execute arbitrary code. (CVE-2020-35965)

It was discovered that FFmpeg did not properly handle data assigned to the tty demuxer. An attacker could possibly use this issue to send specially crafted input to the application and expose sensitive information. (CVE-2021-3566)

It was discovered that FFmpeg did not perform checks on function return values when encoding and formatting input video and audio files. An attacker could possibly use this issue to cause a denial of service (application crash) or execute arbitrary code. (CVE-2021-38114, CVE-2021-38171)

It was discovered that FFmpeg did not properly sanitize function returned data when calculating frame duration values. An attacker could possibly use this issue to cause an assertion failure and then cause a denial of service (application crash). (CVE-2021-38291)

Record
USN-5167-1
Updated
2026-11-02
OSVUSN-5472-1 No score

ffmpeg vulnerabilities

It was discovered that FFmpeg would attempt to divide by zero when using Linear Predictive Coding (LPC) or AAC codecs. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 21.10. (CVE-2020-20445, CVE-2020-20446, CVE-2020-20453)

It was discovered that FFmpeg incorrectly handled certain input. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-20450)

It was discovered that FFmpeg incorrectly handled file conversion to APNG format. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-21041)

It was discovered that FFmpeg incorrectly handled remuxing RTP-hint tracks. A remote attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-21688)

It was discovered that FFmpeg incorrectly handled certain specially crafted AVI files. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-21697)

It was discovered that FFmpeg incorrectly handled writing MOV video tags. An attacker could possibly use this issue to cause a denial of service, obtain sensitive information or execute arbitrary code. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 21.10. (CVE-2020-22015)

It was discovered that FFmpeg incorrectly handled writing MOV files. An attacker could possibly use this issue to cause a denial of service or other unspecified impact. This issue affected only Ubuntu 18.04 LTS. (CVE-2020-22016)

It was discovered that FFmpeg incorrectly handled memory when using certain filters. An attacker could possibly use this issue to cause a denial of service or other unspecified impact. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-22017, CVE-2020-22020, CVE-2020-22022, CVE-2020-22023, CVE-2022-22025, CVE-2020-22026, CVE-2020-22028, CVE-2020-22031, CVE-2020-22032, CVE-2020-22034, CVE-2020-22036, CVE-2020-22042)

It was discovered that FFmpeg incorrectly handled memory when using certain filters. An attacker could possibly use this issue to cause a denial of service or other unspecified impact. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 21.10. (CVE-2020-22019, CVE-2020-22021, CVE-2020-22033)

It was discovered that FFmpeg incorrectly handled memory when using certain filters. An attacker could possibly use this issue to cause a denial of service or other unspecified impact. This issue only affected Ubuntu 21.10. (CVE-2020-22027, CVE-2020-22029, CVE-2020-22030, CVE-2020-22035)

It was discovered that FFmpeg incorrectly handled certain specially crafted JPEG files. An attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 21.10. (CVE-2020-22037)

It was discovered that FFmpeg incorrectly performed calculations in EXR codec. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-35965)

It was discovered that FFmpeg did not verify return values of functions init_vlc and init_get_bits. An attacker could possibly use this issue to cause a denial of service or other unspecified impact. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 21.10. (CVE-2021-38114, CVE-2021-38171)

It was discovered that FFmpeg incorrectly handled certain specially crafted files. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 21.10 and Ubuntu 22.04 LTS. (CVE-2022-1475)

Record
USN-5472-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
ffmpeg
Alpine:v3.13
4.2.0 up to 4.3.3-r0
4.3.3-r0
ffmpeg
Alpine:v3.14
4.2.0 up to 4.4.1-r0
4.4.1-r0
ffmpeg
Alpine:v3.15
4.2.0 up to 4.4.1-r0
4.4.1-r0
ffmpeg
Alpine:v3.16
4.2.0 up to 4.4.1-r0
4.4.1-r0
ffmpeg
Alpine:v3.17
4.2.0 up to 4.4.1-r0
4.4.1-r0
ffmpeg
Alpine:v3.18
4.2.0 up to 4.4.1-r0
4.4.1-r0
ffmpeg
Alpine:v3.19
4.2.0 up to 4.4.1-r0
4.4.1-r0
ffmpeg
Alpine:v3.20
4.2.0 up to 4.4.1-r0
4.4.1-r0
ffmpeg
Alpine:v3.21
4.2.0 up to 4.4.1-r0
4.4.1-r0
ffmpeg
Alpine:v3.22
4.2.0 up to 4.4.1-r0
4.4.1-r0
Show 34 moreShow less
Affected packages
PackageAffectedFixed
ffmpeg
Alpine:v3.23
4.2.0 up to 4.4.1-r0
4.4.1-r0
ffmpeg
Alpine:v3.24
4.2.0 up to 4.4.1-r0
4.4.1-r0
ffmpeg4
Alpine:v3.16
before 4.4.1-r0
4.4.1-r0
ffmpeg4
Alpine:v3.17
before 4.4.1-r0
4.4.1-r0
ffmpeg4
Alpine:v3.18
before 4.4.1-r0
4.4.1-r0
ffmpeg4
Alpine:v3.19
before 4.4.1-r0
4.4.1-r0
ffmpeg4
Alpine:v3.20
before 4.4.1-r0
4.4.1-r0
ffmpeg4
Alpine:v3.21
before 4.4.1-r0
4.4.1-r0
ffmpeg4
Alpine:v3.22
before 4.4.1-r0
4.4.1-r0
ffmpeg
Debian:12
before 7:4.4.1-1
7:4.4.1-1
ffmpeg
Debian:13
before 7:4.4.1-1
7:4.4.1-1
ffmpeg
Debian:14
before 7:4.4.1-1
7:4.4.1-1
ffmpeg
Debian:9
From an advisory covering 13 CVEs
before 7:3.2.16-1+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 9 moreShow less
7:3.2.15-0+deb9u17:3.2.15-0+deb9u27:3.2.15-0+deb9u37:3.2.15-0+deb9u47:3.2.5-17:3.2.6-17:3.2.7-1~deb9u17:3.2.8-1~deb9u17:3.2.9-1~deb9u1
7:3.2.16-1+deb9u1
ffmpeg
Debian:10
From an advisory covering 31 CVEs
before 7:4.1.8-0+deb10u1, plus listed versions
7:4.1.3-17:4.1.4-17:4.1.4-1~deb10u17:4.1.6-1~deb10u1
7:4.1.8-0+deb10u1
ffmpeg
Debian:11
From an advisory covering 11 CVEs
before 7:4.3.3-0+deb11u1, plus listed versions
7:4.3.2-0+deb11u27:4.3.2-17:4.3.2-2
7:4.3.3-0+deb11u1
FFMPEG_jll
Julia
before 4.3.1+0, 4.3.1+2 up to 4.4.0+0
4.3.1+04.4.0+0
FFplay_jll
Julia
before 4.4.4+0
4.4.4+0
ffmpeg
Mageia:8
From an advisory covering 14 CVEs
before 4.3.3-3.mga8
4.3.3-3.mga8
ffmpeg
Mageia:8
From an advisory covering 14 CVEs
before 4.3.3-3.mga8.tainted
4.3.3-3.mga8.tainted
ffmpeg
SUSE:Linux Enterprise Module for Desktop Applications 15 SP5
From an advisory covering 3 CVEs
before 3.4.2-150200.11.57.1
3.4.2-150200.11.57.1
ffmpeg
SUSE:Linux Enterprise Module for Desktop Applications 15 SP6
From an advisory covering 3 CVEs
before 3.4.2-150200.11.57.1
3.4.2-150200.11.57.1
ffmpeg
SUSE:Linux Enterprise Module for Package Hub 15 SP5
From an advisory covering 3 CVEs
before 3.4.2-150200.11.57.1
3.4.2-150200.11.57.1
ffmpeg
SUSE:Linux Enterprise Module for Package Hub 15 SP6
From an advisory covering 3 CVEs
before 3.4.2-150200.11.57.1
3.4.2-150200.11.57.1
ffmpeg
SUSE:Linux Enterprise Workstation Extension 15 SP5
From an advisory covering 3 CVEs
before 3.4.2-150200.11.57.1
3.4.2-150200.11.57.1
ffmpeg
SUSE:Linux Enterprise Workstation Extension 15 SP6
From an advisory covering 3 CVEs
before 3.4.2-150200.11.57.1
3.4.2-150200.11.57.1
ffmpeg
openSUSE:Leap 15.5
From an advisory covering 3 CVEs
before 3.4.2-150200.11.57.1
3.4.2-150200.11.57.1
ffmpeg
openSUSE:Leap 15.6
From an advisory covering 3 CVEs
before 3.4.2-150200.11.57.1
3.4.2-150200.11.57.1
ffmpeg
Ubuntu:Pro:16.04:LTS
before 7:2.8.17-0ubuntu0.1+esm4, plus listed versions
7:2.7.2-1build17:2.8.1-1ubuntu17:2.8.2-1ubuntu17:2.8.3-17:2.8.4-1
Show 16 moreShow less
7:2.8.4-1ubuntu17:2.8.4-1ubuntu27:2.8.4-1ubuntu37:2.8.4-1ubuntu47:2.8.6-1ubuntu17:2.8.6-1ubuntu27:2.8.8-0ubuntu0.16.04.17:2.8.10-0ubuntu0.16.04.17:2.8.11-0ubuntu0.16.04.17:2.8.14-0ubuntu0.16.04.17:2.8.15-0ubuntu0.16.04.17:2.8.15-0ubuntu0.16.04.1+esm17:2.8.17-0ubuntu0.17:2.8.17-0ubuntu0.1+esm17:2.8.17-0ubuntu0.1+esm27:2.8.17-0ubuntu0.1+esm3
7:2.8.17-0ubuntu0.1+esm4
ffmpeg
Ubuntu:18.04:LTS
before 7:3.4.11-0ubuntu0.1, plus listed versions
7:3.3.4-27:3.3.4-2build37:3.4-2ubuntu27:3.4-47:3.4-4build1
Show 8 moreShow less
7:3.4.1-17:3.4.1-1build17:3.4.2-17:3.4.2-1build17:3.4.2-27:3.4.4-0ubuntu0.18.04.17:3.4.6-0ubuntu0.18.04.17:3.4.8-0ubuntu0.2
7:3.4.11-0ubuntu0.1
ffmpeg
Ubuntu:20.04:LTS
before 7:4.2.7-0ubuntu0.1, plus listed versions
7:4.1.4-1build27:4.2.1-27:4.2.1-2ubuntu17:4.2.2-1build17:4.2.2-1ubuntu17:4.2.4-1ubuntu0.1
7:4.2.7-0ubuntu0.1
ffmpeg
Ubuntu:Pro:16.04:LTS
From an advisory covering 29 CVEs
before 7:2.8.17-0ubuntu0.1+esm4, plus listed versions
7:2.7.2-1build17:2.8.1-1ubuntu17:2.8.2-1ubuntu17:2.8.3-17:2.8.4-1
Show 16 moreShow less
7:2.8.4-1ubuntu17:2.8.4-1ubuntu27:2.8.4-1ubuntu37:2.8.4-1ubuntu47:2.8.6-1ubuntu17:2.8.6-1ubuntu27:2.8.8-0ubuntu0.16.04.17:2.8.10-0ubuntu0.16.04.17:2.8.11-0ubuntu0.16.04.17:2.8.14-0ubuntu0.16.04.17:2.8.15-0ubuntu0.16.04.17:2.8.15-0ubuntu0.16.04.1+esm17:2.8.17-0ubuntu0.17:2.8.17-0ubuntu0.1+esm17:2.8.17-0ubuntu0.1+esm27:2.8.17-0ubuntu0.1+esm3
7:2.8.17-0ubuntu0.1+esm4
ffmpeg
Ubuntu:18.04:LTS
From an advisory covering 34 CVEs
before 7:3.4.11-0ubuntu0.1, plus listed versions
7:3.3.4-27:3.3.4-2build37:3.4-2ubuntu27:3.4-47:3.4-4build1
Show 8 moreShow less
7:3.4.1-17:3.4.1-1build17:3.4.2-17:3.4.2-1build17:3.4.2-27:3.4.4-0ubuntu0.18.04.17:3.4.6-0ubuntu0.18.04.17:3.4.8-0ubuntu0.2
7:3.4.11-0ubuntu0.1
ffmpeg
Ubuntu:20.04:LTS
From an advisory covering 34 CVEs
before 7:4.2.7-0ubuntu0.1, plus listed versions
7:4.1.4-1build27:4.2.1-27:4.2.1-2ubuntu17:4.2.2-1build17:4.2.2-1ubuntu17:4.2.4-1ubuntu0.1
7:4.2.7-0ubuntu0.1
ffmpeg
Ubuntu:22.04:LTS
From an advisory covering 34 CVEs
before 7:4.4.2-0ubuntu0.22.04.1, plus listed versions
7:4.4-6ubuntu57:4.4.1-2ubuntu17:4.4.1-3ubuntu17:4.4.1-3ubuntu27:4.4.1-3ubuntu37:4.4.1-3ubuntu5
7:4.4.2-0ubuntu0.22.04.1

History

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

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

In short

CVE-2021-38291 is a high vulnerability (CVSS 7.5) in Ffmpeg, published August 12, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.69%, the 85th percentile. Fixed in ffmpeg 4.3.3-r0.

References

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