How severe is CVE-2023-46407?

CVE-2023-46407 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2023-46407 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-46407?

CVE-2023-46407 affects Ffmpeg. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-46407?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-46407 published?

CVE-2023-46407 was published on 2023-10-27 and last updated on 2026-06-17.

CVE-2023-46407

CVE-2023-46407 is a medium-severity vulnerability in Ffmpeg with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Ffmpeg
Published: 2023-10-27
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2023-46407?: 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.
How severe is CVE-2023-46407?: CVE-2023-46407 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2023-46407 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-46407?: CVE-2023-46407 affects Ffmpeg. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-46407?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-46407 published?: CVE-2023-46407 was published on 2023-10-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ffmpeg:ffmpeg:6.1:*:*:*:*:*:*:*

More vulnerabilities in Ffmpeg

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CVE-2013-0872 — Critical (CVSS 10.0): The swr_init function in libswresample/swresample.c in FFmpeg before 1.1.3 allows remote attackers to have an…
CVE-2011-3937 — Critical (CVSS 10.0): The H.263 codec (libavcodec/h263dec.c) in FFmpeg 0.7.x before 0.7.12, 0.8.x before 0.8.11, and unspecified versions…
CVE-2012-2804 — Critical (CVSS 10.0): Unspecified vulnerability in libavcodec/indeo3.c in FFmpeg before 0.11 and Libav 0.8.x before 0.8.5 has unknown impact…

All CVEs affecting Ffmpeg →

Other CWE-125 (Out-of-bounds Read) vulnerabilities

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CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
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