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Fencer Vulns
high 8.8

CVE-2019-15942 json

FFmpeg through 4.2 has a "Conditional jump or move depends on uninitialised value" issue in...

published 2019-09-05 7 y ago modified 2026-07-23 3 mo ago also EUVD-2019-6843 , JLSEC-2025-105

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 81%
public exploits
0
none known

Summary

FFmpeg through 4.2 has a "Conditional jump or move depends on uninitialised value" issue in h2645_parse because alloc_rbsp_buffer in libavcodec/h2645_parse.c mishandles rbsp_buffer.

Patch / fix

  • julia FFMPEG_jll 4.3.1+0
  • ffmpeg ffmpeg 4.2.1
  • 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 +10 more 4.2.1-r0
  • ffmpeg4 Alpine 3.22, Alpine 3.21, Alpine 3.20 +4 more 4.2.1-r0

alpine advisories ALPINE-CVE-2019-15942

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

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-15942 updated cvss 8.8

ffmpeg: conditional jump or move depends on uninitialised value

  • Red Hat Enterprise Linux 5 qffmpeg
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.02% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • trac.ffmpeg.org https://trac.ffmpeg.org/ticket/8093 referenced PoC, tagged "exploit" by a source, unverified

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+0

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Add more accurate affected version ranges.