Vulnerability-Lookup

UBUNTU-CVE-2026-66037 (CVE-2026-66037)

Vulnerability from osv_ubuntu – Published: 2026-07-24 20:18 – Updated: 2026-09-09 22:36 – Source website

Details

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.

Severity

6.5 (Medium)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

5.5 (Medium)


                    
                      CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-66037	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-66037	REPORT
	https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23627	REPORT
	https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/8670…	REPORT
	https://www.vulncheck.com/advisories/ffmpeg-iamf-…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "ffmpeg",
            "binary_version": "7:8.0.1-3ubuntu2+esm4"
          },
          {
            "binary_name": "libavcodec-extra",
            "binary_version": "7:8.0.1-3ubuntu2+esm4"
          },
          {
            "binary_name": "libavcodec-extra62",
            "binary_version": "7:8.0.1-3ubuntu2+esm4"
          },
          {
            "binary_name": "libavcodec62",
            "binary_version": "7:8.0.1-3ubuntu2+esm4"
          },
          {
            "binary_name": "libavdevice62",
            "binary_version": "7:8.0.1-3ubuntu2+esm4"
          },
          {
            "binary_name": "libavfilter-extra",
            "binary_version": "7:8.0.1-3ubuntu2+esm4"
          },
          {
            "binary_name": "libavfilter-extra11",
            "binary_version": "7:8.0.1-3ubuntu2+esm4"
          },
          {
            "binary_name": "libavfilter11",
            "binary_version": "7:8.0.1-3ubuntu2+esm4"
          },
          {
            "binary_name": "libavformat-extra",
            "binary_version": "7:8.0.1-3ubuntu2+esm4"
          },
          {
            "binary_name": "libavformat-extra62",
            "binary_version": "7:8.0.1-3ubuntu2+esm4"
          },
          {
            "binary_name": "libavformat62",
            "binary_version": "7:8.0.1-3ubuntu2+esm4"
          },
          {
            "binary_name": "libavutil60",
            "binary_version": "7:8.0.1-3ubuntu2+esm4"
          },
          {
            "binary_name": "libswresample6",
            "binary_version": "7:8.0.1-3ubuntu2+esm4"
          },
          {
            "binary_name": "libswscale9",
            "binary_version": "7:8.0.1-3ubuntu2+esm4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:26.04:LTS",
        "name": "ffmpeg",
        "purl": "pkg:deb/ubuntu/ffmpeg@7:8.0.1-3ubuntu2+esm4?arch=source\u0026distro=esm-apps/resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "7:7.1.1-1ubuntu4",
        "7:7.1.2-1ubuntu3",
        "7:7.1.2-1ubuntu4",
        "7:7.1.3-1ubuntu1",
        "7:8.0.1-2ubuntu1",
        "7:8.0.1-3ubuntu1",
        "7:8.0.1-3ubuntu2",
        "7:8.0.1-3ubuntu2+esm1",
        "7:8.0.1-3ubuntu2+esm3",
        "7:8.0.1-3ubuntu2+esm4"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2026-66037",
  "modified": "2026-09-09T22:36:44Z",
  "published": "2026-07-24T20:18:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-66037"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-66037"
    },
    {
      "type": "REPORT",
      "url": "https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23627"
    },
    {
      "type": "REPORT",
      "url": "https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/86708357d126af84c16f80d9c57335d1e8c845c5"
    },
    {
      "type": "REPORT",
      "url": "https://www.vulncheck.com/advisories/ffmpeg-iamf-demuxer-uncontrolled-resource-consumption-via-mix-presentation-obu"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "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",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-66037"
  ]
}

CVE-2026-66037 (GCVE-0-2026-66037)

Vulnerability from cvelistv5 – Published: 2026-07-24 19:36 – Updated: 2026-07-28 01:06 X_Open Source

Title

FFmpeg IAMF Demuxer Uncontrolled Resource Consumption via mix_presentation_obu()

Summary

Severity

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

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-27 16:15 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

VulnCheck mitre root

References

3 references

URL	Tags
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23627	issue-tracking
https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/8670…	patch
https://www.vulncheck.com/advisories/ffmpeg-iamf-…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
FFmpeg	FFmpeg	Affected: 0 , ≤ 8.1.2 (semver) Unaffected: 86708357d126af84c16f80d9c57335d1e8c845c5 (git) cpe:2.3:a:ffmpeg:ffmpeg::::::::

Date Public

2026-06-28 00:00

Credits

Adrian Junge (vurlo)

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-66037",
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                  },
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                  }
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                "role": "CISA Coordinator",
                "timestamp": "2026-07-27T16:15:23.636110Z",
                "version": "2.0.3"
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        },
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    "cna": {
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          "product": "FFmpeg",
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      ],
      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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      "metrics": [
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            "baseScore": 7.1,
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            "exploitMaturity": "NOT_DEFINED",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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UBUNTU-CVE-2026-66037 (CVE-2026-66037)

CVE-2026-66037 (GCVE-0-2026-66037)

Tags

Sightings

Nomenclature

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