FFmpeg before commit 983dae9 contains an out-of-bounds read in the AV1 RTP packetizer (libavformat/rtpenc_av1.c). The keyframe detection loop that searches for a sequence header OBU advanced its pointer and remaining-size counter by the encoded header length plus the OBU payload size without first bounding the OBU size against the remaining data. A crafted OBU size causes the remaining-size counter to wrap to a positive value, causing the next loop iteration to dereference a pointer beyond the end of the packet buffer. A crafted AV1 input packet muxed to RTP triggers the out-of-bounds read.

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 remote Fedora 45 host has packages installed that are affected by multiple vulnerabilities as referenced in the FEDORA-2026-040732b5dc advisory.

    Latest FFmpeg stable release and rebuilds of dependent packages. Fixes a number of high severity security     bugs:
    CVE-2026-64832 CVE-2026-70628 CVE-2026-70632 CVE-2026-75147 CVE-2026-75146 .

    Includes:

    * icecat release 140.16.0
    * wivrn v26.9, which fixes install of the APK via the dashboard.


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 before commit 983dae9 contains an out-of-bounds read in the AV1 RTP packetizer     (libavformat/rtpenc_av1.c). The keyframe detection loop that searches for a sequence header OBU advanced     its pointer and remaining-size counter by the encoded header length plus the OBU payload size without     first bounding the OBU size against the remaining data. A crafted OBU size causes the remaining-size     counter to wrap to a positive value, causing the next loop iteration to dereference a pointer beyond the     end of the packet buffer. A crafted AV1 input packet muxed to RTP triggers the out-of-bounds read.
    (CVE-2026-75147)

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

ID	Name	Product	Family	Type	Severity
358433	Fedora 44 : ffmpeg (2026-3e109a0c85)	Nessus	Fedora Local Security Checks	Local	critical
349770	Fedora 45 : OpenBoard / Pencil2D / alsa-plugins / amarok / aqualung / atomes / etc (2026-040732b5dc)	Nessus	Fedora Local Security Checks	Local	high
338202	Linux Distros Unpatched Vulnerability : CVE-2026-75147	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-75147

medium

Tenable Plugins

critical

high

medium