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.
Published: 2026-08-27
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service
Action: Update FFmpeg
AI Analysis

Impact

The vulnerability is an integer overflow (CWE‑190) in FFmpeg's libavfilter/vf_scale.c component. A crafted video frame triggers overflow during scaling calculations, leading to a crash or uncontrolled resource consumption that interrupts the service. This results in a denial of service for any application or service that uses FFmpeg to process media.

Affected Systems

All FFmpeg installations that employ the legacy libavfilter/vf_scale.c implementation are affected. No specific release series is listed in the advisory, so any FFmpeg build containing the vulnerable code before the patch is at risk. Administrators should verify whether their FFmpeg binary includes the insecure scaling filter, as version information is not provided.

Risk and Exploitability

The EPSS score of less than 1% indicates a very low likelihood of exploitation, and the vulnerability is not listed in the CISA KEV catalog. Nevertheless, the CVSS score of 6.5 reflects a moderate risk because an attacker who can supply a malicious video to the FFmpeg process can trigger a crash or excessive resource use. Based on the description, it is inferred that the attack vector is the receipt of untrusted media input to the scaling filter. Exploitation requires the attacker to control the content of a video file processed by a vulnerable FFmpeg instance, which is typical of media servers, transcoding pipelines, or any software that accepts arbitrary video from external sources.

Generated by OpenCVE AI on August 31, 2026 at 17:25 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade FFmpeg to the latest release that contains the integer‑overflow fix.
  • Implement bounds checking on source video resolution before scaling to prevent overflow.
  • If an upgrade is not immediately possible, run FFmpeg in a restricted container with tight CPU, memory, and I/O limits and validate all incoming media files before feeding them to the scaling filter.
  • Configure logging and monitoring to detect sudden crashes or abnormal resource consumption, and set up automated restarts or fail‑over mechanisms to maintain service availability.

Generated by OpenCVE AI on August 31, 2026 at 17:25 UTC.

Tracking

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Advisories

No advisories yet.

History

Mon, 31 Aug 2026 16:30:00 +0000

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'}


Fri, 28 Aug 2026 18:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-680

Fri, 28 Aug 2026 12:15:00 +0000

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
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


Fri, 28 Aug 2026 10:00:00 +0000

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

Fri, 28 Aug 2026 06:15:00 +0000

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

Thu, 27 Aug 2026 18:00:00 +0000

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

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-08-31T15:18:53.333Z

Reserved: 2026-04-06T00:00:00.000Z

Link: CVE-2026-38343

cve-icon Vulnrichment

Updated: 2026-08-28T18:34:23.633Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-08-28T00:17:26.980

Modified: 2026-09-09T15:53:46.577

Link: CVE-2026-38343

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-08-27T00:00:00Z

Links: CVE-2026-38343 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-31T17:30:03Z

Weaknesses
  • CWE-190

    Integer Overflow or Wraparound