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FFmpeg CVE-2026-38343

| EUVDEUVD-2026-67325 MEDIUM
Integer Overflow or Wraparound (CWE-190)
2026-08-27 mitre GHSA-p275-5394-cxwq
6.5
CVSS 3.1 · Vendor: mitre
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Severity by source

Vendor (mitre) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
vuln.today AI
6.5 MEDIUM

File delivery is network-based with no privileges needed; user must open the file (UI:R); impact is crash only, so C and I remain N.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Red Hat
5.5 MEDIUM
qualitative

Primary rating from Vendor (mitre).

CVSS VectorVendor: mitre

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

4
Analysis Generated
Aug 31, 2026 - 16:34 vuln.today
CVSS changed
Aug 31, 2026 - 16:22 NVD
6.5 (MEDIUM)
CVE Published
Aug 27, 2026 - 00:00 cve.org
UNKNOWN (no severity yet)
CVE Published
Aug 27, 2026 - 00:00 cve.org
MEDIUM 6.5

DescriptionCVE.org

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.

AnalysisAI

Integer overflow in FFmpeg's libavfilter/vf_scale.c video scaling filter allows a remote attacker to crash the FFmpeg process by delivering a crafted video file that a user then opens or processes. Affected is FFmpeg development build N-122528-gdd2976b9e1, a git-snapshot identifier rather than a stable release. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
technique details hidden
Exploit
technique details hidden
Execution
technique details hidden
Impact
technique details hidden

Vulnerability AssessmentAI

Exploitation User interaction is required: a user or automated system must actively open or process the crafted video file with the affected FFmpeg build (UI:R in CVSS). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 base score of 6.5 (Medium) is driven by AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation No specific patched release version is confirmed in the available data. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-38343 vulnerability details – vuln.today

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