CVE-2019-13312

block_cmp() in libavcodec/zmbvenc.c in FFmpeg 4.1.3 has a heap-based buffer over-read.

8.8 HighFix available

block_cmp() in libavcodec/zmbvenc.c in FFmpeg 4.1.3 has a heap-based buffer over-read.

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

1.71%Up 0.7 points since Apr 14, 2021

What each source reports

NVD Score used 8.8

block_cmp() in libavcodec/zmbvenc.c in FFmpeg 4.1.3 has a heap-based buffer over-read.

Record: CVE-2019-13312
CVSS 3.0: 8.8 HighCVSS:3.0/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-125
Updated: 2026-11-02

CVE List No score

block_cmp() in libavcodec/zmbvenc.c in FFmpeg 4.1.3 has a heap-based buffer over-read.

Record: CVE-2019-13312
Updated: 2026-11-02

EUVDEUVD-2019-4817 No score

block_cmp() in libavcodec/zmbvenc.c in FFmpeg 4.1.3 has a heap-based buffer over-read.

Record: EUVD-2019-4817
Updated: 2026-11-03

GitHub AdvisoriesGHSA-rmv2-95pm-pw73 No score

block_cmp() in libavcodec/zmbvenc.c in FFmpeg 4.1.3 has a heap-based buffer over-read.

block_cmp() in libavcodec/zmbvenc.c in FFmpeg 4.1.3 has a heap-based buffer over-read.

Record: GHSA-rmv2-95pm-pw73
Updated: 2026-11-02

OSVALPINE-CVE-2019-13312 8.8

block_cmp() in libavcodec/zmbvenc.c in FFmpeg 4.1.3 has a heap-based buffer over-read.

Record: ALPINE-CVE-2019-13312
CVSS 3.0: 8.8 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-03

OSV 8.8

block_cmp() in libavcodec/zmbvenc.c in FFmpeg 4.1.3 has a heap-based buffer over-read.

Record: CVE-2019-13312
CVSS 3.0: 8.8 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-07

OSVUBUNTU-CVE-2019-13312 8.8

block_cmp() in libavcodec/zmbvenc.c in FFmpeg 4.1.3 has a heap-based buffer over-read.

Record: UBUNTU-CVE-2019-13312
CVSS 3.0: 8.8 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVUSN-4431-1 No score

ffmpeg vulnerabilities

It was discovered that FFmpeg incorrectly verified empty audio packets or HEVC data. An attacker could possibly use this issue to cause a denial of service via a crafted file. This issue only affected Ubuntu 16.04 LTS, as it was already fixed in Ubuntu 18.04 LTS. For more information see: https://usn.ubuntu.com/usn/usn-3967-1 (CVE-2018-15822, CVE-2019-11338)

It was discovered that FFmpeg incorrectly handled sscanf failures. An attacker could possibly use this issue to cause a denial of service or other unspecified impact. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2019-12730)

It was discovered that FFmpeg incorrectly handled certain WEBM files. An attacker could possibly use this issue to obtain sensitive data or other unspecified impact. This issue only affected Ubuntu 20.04 LTS. (CVE-2019-13312)

It was discovered that FFmpeg incorrectly handled certain AVI files. An attacker could possibly use this issue to cause a denial of service or other unspecified impact. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2019-13390)

It was discovered that FFmpeg incorrectly handled certain input. 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. (CVE-2019-17539)

It was discovered that FFmpeg incorrectly handled certain input during decoding of VQA files. An attacker could possibly use this issue to obtain sensitive information or other unspecified impact. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2019-17542)

It was discovered that FFmpeg incorrectly handled certain JPEG files. An attacker could possibly use this issue to obtain sensitive information or other unspecified impact. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-12284)

It was discovered that FFmpeg incorrectly handled certain M3U8 files. An attacker could possibly use this issue to obtain sensitive information or other unspecified impact. (CVE-2020-13904)

Record: USN-4431-1
Updated: 2026-11-02

Affected products

ffmpeg

Affected packages

Affected packages
Package	Affected	Fixed
`ffmpeg` Alpine:v3.11	before 4.2.4-r0	4.2.4-r0
`ffmpeg` Ubuntu:20.04:LTS	before 7:4.2.4-1ubuntu0.1, plus listed versions 7:4.1.4-1build27:4.2.1-27:4.2.1-2ubuntu17:4.2.2-1build17:4.2.2-1ubuntu1	7:4.2.4-1ubuntu0.1
`ffmpeg` Ubuntu:16.04:LTS From an advisory covering 9 CVEs	before 7:2.8.17-0ubuntu0.1, 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 11 moreShow less 7:2.8.4-1ubuntu17:2.8.4-1ubuntu27:2.8.4-1ubuntu37:2.8.4-1ubuntu47:2.8.6-1ubuntu17:2.8.6-1ubuntu27:2.8.8-0ubuntu0.16.04.17:2.8.10-0ubuntu0.16.04.17:2.8.11-0ubuntu0.16.04.17:2.8.14-0ubuntu0.16.04.17:2.8.15-0ubuntu0.16.04.1	7:2.8.17-0ubuntu0.1
`ffmpeg` Ubuntu:18.04:LTS From an advisory covering 9 CVEs	before 7:3.4.8-0ubuntu0.2, plus listed versions 7:3.3.4-27:3.3.4-2build37:3.4-2ubuntu27:3.4-47:3.4-4build1 Show 7 moreShow less 7:3.4.1-17:3.4.1-1build17:3.4.2-17:3.4.2-1build17:3.4.2-27:3.4.4-0ubuntu0.18.04.17:3.4.6-0ubuntu0.18.04.1	7:3.4.8-0ubuntu0.2
`ffmpeg` Ubuntu:20.04:LTS From an advisory covering 9 CVEs	before 7:4.2.4-1ubuntu0.1, plus listed versions 7:4.1.4-1build27:4.2.1-27:4.2.1-2ubuntu17:4.2.2-1build17:4.2.2-1ubuntu1	7:4.2.4-1ubuntu0.1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	affected, aliases, references	OSV
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

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

In short

CVE-2019-13312 is a high vulnerability (CVSS 8.8) in Ffmpeg, published July 5, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.71%, the 77th percentile. Fixed in ffmpeg 4.2.4-r0.

References

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