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CVE-2026-65705

FFmpeg 3.4 - 8.1.2 vf_floodfill Out-of-Bounds Write via filter_frame()

Published: Jul 23, 2026Updated: Jul 24, 2026 Sources: CVE List NVDCWE-131
7.8HIGH
NVD MITRE
EPSS Score
0.1%
Top 96.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

Description

FFmpeg versions 3.4 through 8.1.2 contain an out-of-bounds write vulnerability in the vf_floodfill video filter that allows attackers to corrupt heap memory by supplying a dynamically sized video stream with filtergraph reinitialization disabled via -reinit_filter 0. When config_input() allocates the points traversal stack based on initial frame dimensions and a subsequent larger frame is processed, filter_frame() performs flood-fill neighbor pushes beyond the original allocation boundary, resulting in heap corruption and process crash with potential for code execution depending on heap layout and process hardening.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:NUI:RS:UC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-131CWE-787

Affected Products

FFmpeg
oss-project·USaka libavcodec
FFmpegLibrary
OSS Libraries / generic-library

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23780
code.ffmpeg.org
https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/f186c50cf53aec20e9a29059cb22ca3f2d59201c
code.ffmpeg.org
https://www.vulncheck.com/advisories/ffmpeg-vf-floodfill-out-of-bounds-write-via-filter-frame
vulncheck.com

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