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Ffmpeg CVE-2026-66037

| EUVDEUVD-2026-48739 HIGH
Allocation of Resources Without Limits or Throttling (CWE-770)
2026-07-24 VulnCheck
7.1
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
7.1 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
SUSE
5.5 MEDIUM
AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Red Hat
6.5 MEDIUM
qualitative

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
P
Scope
X

Lifecycle Timeline

2
Analysis Generated
Jul 26, 2026 - 11:40 vuln.today
CVE Published
Jul 24, 2026 - 19:36 cve.org
HIGH 7.1

DescriptionCVE.org

FFmpeg through 8.1.2, fixed in commit 5d7112c, contains an uncontrolled resource consumption vulnerability in the IAMF demuxer that allows an unauthenticated attacker to cause multi-gigabyte memory allocation from a 17-byte input file by supplying a crafted count_label field. The mix_presentation_obu() function in libavformat/iamf_parse.c calls av_calloc(count_label, sizeof(*language_label)) with an attacker-controlled value before validating available OBU data, enabling an allocation amplification of approximately 126 million bytes per input byte that exhausts process memory or triggers an OOM-kill during format probing.

AnalysisAI

Uncontrolled memory allocation in FFmpeg through 8.1.2 allows a remote attacker to exhaust process memory by supplying a crafted IAMF media file as small as 17 bytes. The IAMF demuxer's mix_presentation_obu() function calls av_calloc() with an attacker‑controlled count_label value before validating input data, causing an amplification of approximately 126 million bytes per input byte. Although the CVSS 4.0 score is 7.1 and no active exploitation has been observed (EPSS 0.28%), the vulnerability can be triggered with minimal user interaction, making it a credible denial‑of‑service risk in media processing pipelines.

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Not-Affected
SUSE Linux Enterprise Desktop 15 SP7 Not-Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 Not-Affected
SUSE Linux Enterprise Module for Desktop Applications 15 SP7 Not-Affected
SUSE Linux Enterprise Module for Package Hub 15 SP7 Not-Affected

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CVE-2026-66037 vulnerability details – vuln.today

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