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Fencer Intel
high 8.1

CVE-2018-13305 json

In FFmpeg 4.0.1, due to a missing check for negative values of the mquant variable, the vc1_put_blocks_clamped function in libavcodec/vc1_b…

published 8y ago modified 4mo ago also EUVD-2018-5253

cvss
8.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.4%
EPSS 1.4% chance of exploitation in 30 days, percentile 72%
public exploits
0
none known

Summary

In FFmpeg 4.0.1, due to a missing check for negative values of the mquant variable, the vc1_put_blocks_clamped function in libavcodec/vc1_block.c may trigger an out-of-array access while converting a crafted AVI file to MPEG4, leading to an information disclosure or a denial of service.

Patch / fix

  • ffmpeg SLE Workstation Extension 15, SLE Module for Package Hub 15, SLE Module for Desktop Applications 15 3.4.2-4.12.4

suse advisories SUSE-SU-2018:3609-1

  • ffmpeg-4 openSUSE Tumbleweed 4.4-5.2
  • ffmpeg-4 Package Hub 15 SP1, Package Hub 15, Package Hub 12 SP2 +1 more 4.2.1-bp151.5.3.1

opensuse advisories openSUSE-SU-2024:10754-1openSUSE-SU-2020:0024-1

  • ffmpeg Alpine 3.24, Alpine 3.23, Alpine 3.22 +12 more 4.1-r0
  • ffmpeg4 Alpine 3.22, Alpine 3.21, Alpine 3.20 +4 more 4.1-r0

alpine advisories ALPINE-CVE-2018-13305

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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Exploit prediction

1.41% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 8.1 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:P/I:N/A:P

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.