How severe is CVE-2018-12459?

CVE-2018-12459 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-12459 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-12459?

CVE-2018-12459 affects Ffmpeg. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-12459?

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

When was CVE-2018-12459 published?

CVE-2018-12459 was published on 2018-06-15 and last updated on 2026-06-17.

CVE-2018-12459

CVE-2018-12459 is a medium-severity vulnerability in Ffmpeg with a CVSS 3.x base score of 6.5. 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-20.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Ffmpeg
Published: 2018-06-15
Last modified: 2026-06-17

Description

An inconsistent bits-per-sample value in the ff_mpeg4_decode_picture_header function in libavcodec/mpeg4videodec.c in FFmpeg 4.0 may trigger an assertion violation while converting a crafted AVI file to MPEG4, leading to a denial of service.

Frequently asked questions

What is CVE-2018-12459?: An inconsistent bits-per-sample value in the ff_mpeg4_decode_picture_header function in libavcodec/mpeg4videodec.c in FFmpeg 4.0 may trigger an assertion violation while converting a crafted AVI file to MPEG4, leading to a denial of service.
How severe is CVE-2018-12459?: CVE-2018-12459 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-12459 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-12459?: CVE-2018-12459 affects Ffmpeg. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-12459?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-12459 published?: CVE-2018-12459 was published on 2018-06-15 and last updated on 2026-06-17.

References

https://github.com/FFmpeg/FFmpeg/commit/2fc108f60f98cd00813418a8754a46476b404a3c

Affected products (1)

cpe:2.3:a:ffmpeg:ffmpeg:4.0:*:*:*:*:*:*:*

More vulnerabilities in Ffmpeg

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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…

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