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Fencer Vulns
high 8.8

CVE-2020-14212 json

FFmpeg through 4.3 has a heap-based buffer overflow in `avio_get_str` in `libavformat/aviobuf.c`...

published 2020-06-16 6 y ago modified 2026-07-23 3 mo ago also EUVD-2020-6365 , JLSEC-2025-109

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits
0
none known

Summary

FFmpeg through 4.3 has a heap-based buffer overflow in avio_get_str in libavformat/aviobuf.c because dnn_backend_native.c calls ff_dnn_load_model_native and a certain index check is omitted.

Patch / fix

  • julia FFMPEG_jll 4.3.1+2
  • ffmpeg ffmpeg 4.3.1
  • ffmpeg Debian 14, Debian 13, Debian 12 7:4.3.1-1

debian advisories DEBIAN-CVE-2020-14212

  • ffmpeg Alpine 3.24, Alpine 3.23, Alpine 3.22 +10 more 4.3.1-r0
  • ffmpeg4 Alpine 3.22, Alpine 3.21, Alpine 3.20 +4 more 4.3.1-r0

alpine advisories ALPINE-CVE-2020-14212

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

Exploit prediction

1.70% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P
OSV 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
julia FFMPEG_jll
>=4.3.1+0, <4.3.1+2
4.3.1+2

Classification

Weakness

References

Sources

Fencer Vulns 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.