CVE-2026-38343

ffmpeg: FFmpeg: Denial of Service via integer overflow in video scaling

Published Aug 27, 2026 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Description

An integer overflow in the libavfilter/vf_scale.c component of FFmpeg N-122528-gdd2976b9e1 allows attackers to cause a Denial of Service (DoS) via supplying a crafted video file.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

No data.

Vendor Product Versions

Ffmpeg

Version	Status	Scheme	Platform
`N-122528-gdd2976b9e1`	affected	code_commit	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.355% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://code.ffmpeg.org/FFmpeg/FFmpeg/issues/21587
https://nvd.nist.gov/vuln/detail/CVE-2026-38343
https://www.cve.org/CVERecord?id=CVE-2026-38343

History

Aug 31, 2026 4:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}`	ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}` cvssV3_1 `{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}`

Aug 28, 2026 6:15 PM Weaknesses updated View changes

Type	Values Removed	Values Added
Weaknesses	CWE-680

Aug 28, 2026 12:15 PM Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Title	Integer Overflow in FFmpeg's Scale Filter Allows Denial of Service	ffmpeg: FFmpeg: Denial of Service via integer overflow in video scaling
Weaknesses		CWE-190
References		https://nvd.nist.gov/vuln/detail/CVE-2026-38343 https://www.cve.org/CVERecord?id=CVE-2026-38343
Metrics	threat_severity `None`	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}` threat_severity `Moderate`

Aug 28, 2026 10:00 AM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Ffmpeg Ffmpeg ffmpeg
Vendors & Products		Ffmpeg Ffmpeg ffmpeg

Aug 28, 2026 6:15 AM Title updated. Weaknesses updated View changes

Type	Values Removed	Values Added
Title		Integer Overflow in FFmpeg's Scale Filter Allows Denial of Service
Weaknesses		CWE-680

Aug 27, 2026 6:00 PM Description updated. Added references View changes

Type	Values Removed	Values Added
Description		An integer overflow in the libavfilter/vf_scale.c component of FFmpeg N-122528-gdd2976b9e1 allows attackers to cause a Denial of Service (DoS) via supplying a crafted video file.
References		https://code.ffmpeg.org/FFmpeg/FFmpeg/issues/21587