CVE-2023-46407

FFmpeg prior to commit bf814 was discovered to contain an out of bounds read via the dist-...

5.5 MediumFix available

FFmpeg prior to commit bf814 was discovered to contain an out of bounds read via the dist->alphabet_size variable in the read_vlc_prefix() function.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

0.31%Up 0.3 points since Oct 28, 2023

What each source reports

NVD Score used 5.5

FFmpeg prior to commit bf814 was discovered to contain an out of bounds read via the dist->alphabet_size variable in the read_vlc_prefix() function.

Record: CVE-2023-46407
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Weakness: CWE-125
Updated: 2026-11-02

CVE List No score

FFmpeg prior to commit bf814 was discovered to contain an out of bounds read via the dist->alphabet_size variable in the read_vlc_prefix() function.

Record: CVE-2023-46407
Updated: 2026-11-02

EUVDEUVD-2023-50626 No score

FFmpeg prior to commit bf814 was discovered to contain an out of bounds read via the dist->alphabet_size variable in the read_vlc_prefix() function.

Record: EUVD-2023-50626
Updated: 2026-11-03

GitHub AdvisoriesGHSA-9j42-4j78-g4mh 5.5

FFmpeg prior to commit bf814 was discovered to contain an out of bounds read via the dist-...

FFmpeg prior to commit bf814 was discovered to contain an out of bounds read via the dist->alphabet_size variable in the read_vlc_prefix() function.

Record: GHSA-9j42-4j78-g4mh
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Weakness: CWE-125
Updated: 2026-11-02

OSVALPINE-CVE-2023-46407 5.5

FFmpeg prior to commit bf814 was discovered to contain an out of bounds read via the dist->alphabet_size variable in the read_vlc_prefix() function.

Record: ALPINE-CVE-2023-46407
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Updated: 2026-11-03

OSVUBUNTU-CVE-2023-46407 5.5

FFmpeg prior to commit bf814 was discovered to contain an out of bounds read via the dist->alphabet_size variable in the read_vlc_prefix() function.

Record: UBUNTU-CVE-2023-46407
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Updated: 2026-11-02

OSV No score

FFmpeg prior to commit bf814 was discovered to contain an out of bounds read via the dist->alphabet_size variable in the read_vlc_prefix() function.

Record: CVE-2023-46407
Updated: 2026-11-07

Affected products

ffmpeg

Affected packages

Affected packages
Package	Affected	Fixed
`ffmpeg` Alpine:v3.19	before 6.1-r0	6.1-r0
`ffmpeg` Alpine:v3.20	before 6.1-r0	6.1-r0
`ffmpeg` Alpine:v3.21	before 6.1-r0	6.1-r0
`ffmpeg` Alpine:v3.22	before 6.1-r0	6.1-r0
`ffmpeg` Alpine:v3.23	before 6.1-r0	6.1-r0
`ffmpeg` Alpine:v3.24	before 6.1-r0	6.1-r0

History

History
Recorded	Changed	Sources
Nov 6, 2026	facts	OSV
Nov 3, 2026	affected, aliases, facts, references	OSV
Nov 3, 2026	affected, facts
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-2023-46407 is a medium vulnerability (CVSS 5.5) in Ffmpeg, published October 27, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.31%, the 24th percentile. Fixed in ffmpeg 6.1-r0.

References

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