UBUNTU-CVE-2026-66037

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Source
https://ubuntu.com/security/CVE-2026-66037
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66037.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-66037
Upstream
Published
2026-07-24T20:18:00Z
Modified
2026-09-10T00:45:12Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
  • 7.1 (High) CVSS_V4 - 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 CVSS Calculator
  • Ubuntu - medium
Summary
[none]
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.

References

Affected packages

Ubuntu:Pro:26.04:LTS / ffmpeg

Package

Name
ffmpeg
Purl
pkg:deb/ubuntu/ffmpeg?arch=source&distro=esm-apps%2Fresolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

7:7.*
7:7.1.1-1ubuntu4
7:7.1.2-1ubuntu3
7:7.1.2-1ubuntu4
7:7.1.3-1ubuntu1
7:8.*
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

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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66037.json"