FFmpeg read_var_block_data memory corruption

published 2022-06-18 4y ago modified 2026-06-17 4mo ago also EUVD-2014-1189

cvss: 7.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 46%
public exploits: 0; none known

A vulnerability classified as critical has been found in FFmpeg 2.0. Affected is the function read_var_block_data. The manipulation leads to memory corruption. It is possible to launch the attack remotely. It is recommended to apply a patch to fix this issue.

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CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: last yr. (2025-04-14)

Exploit prediction

0.55% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
NVD	3.1	7.8	CVSS:3.1/AV:L/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

Affected products

unspecified FFmpeg

Classification

Weakness

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-787 Out-of-bounds Write

References

git.videolan.org /?p=ffmpeg.git%3Ba=commit%3Bh=18f94df8af
vuldb.com /?id.12366
third-party-advisory, vdb-entry

Sources

CVE List CVE-2014-125015
NVD CVE-2014-125015

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