How severe is CVE-2018-12458?

CVE-2018-12458 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-2018-12458 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-12458?

CVE-2018-12458 primarily affects Ffmpeg. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-12458?

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

When was CVE-2018-12458 published?

CVE-2018-12458 was published on 2018-06-15 and last updated on 2026-06-17.

CVE-2018-12458

CVE-2018-12458 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: 2% (72nd 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 improper integer type in the mpeg4_encode_gop_header function in libavcodec/mpeg4videoenc.c in FFmpeg 2.8 and 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-2018-12458?: An improper integer type in the mpeg4_encode_gop_header function in libavcodec/mpeg4videoenc.c in FFmpeg 2.8 and 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-2018-12458?: CVE-2018-12458 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-2018-12458 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-12458?: CVE-2018-12458 primarily affects Ffmpeg. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-12458?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-12458 published?: CVE-2018-12458 was published on 2018-06-15 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:ffmpeg:ffmpeg:2.8:*:*:*:*:*:*:*
cpe:2.3:a:ffmpeg:ffmpeg:4.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

More vulnerabilities in Ffmpeg

CVE-2013-0864 — Critical (CVSS 10.0): The gif_copy_img_rect function in libavcodec/gifdec.c in FFmpeg before 1.1.2 performs an incorrect calculation for an…
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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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