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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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.
    (CVE-2026-66037)

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-3e109a0c85 advisory.

    Latest upstream bugfix release from 8.1 branch. Changes:
    https://code.ffmpeg.org/FFmpeg/FFmpeg/src/branch/release/8.1/Changelog .























Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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.
    (CVE-2026-66037)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
464260	Echo: ffmpeg: security update to 7:7.1.5-0+deb13u1+e3	Tenable Cloud Security	Echo Local Security Checks	Local	high
464260	Echo: ffmpeg: security update to 7:7.1.5-0+deb13u1+e3	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	high
358433	Fedora 44 : ffmpeg (2026-3e109a0c85)	Nessus	Fedora Local Security Checks	Local	critical
329730	Linux Distros Unpatched Vulnerability : CVE-2026-66037	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-66037

high

Tenable Plugins

high

high

critical

high