This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-75146 →

UBUNTU-CVE-2026-75146

FFmpeg before commit 65b0dab contains an out-of-bounds read in the DASH demuxer (libavformat/dashdec.c). When a live DASH manifest is refreshed with a...

Original description

The description as published by the source.

FFmpeg before commit 65b0dab contains an out-of-bounds read in the DASH demuxer (libavformat/dashdec.c). When a live DASH manifest is refreshed with a startNumber that is lower than the previous value, the current sequence number is driven negative. The fragment retrieval function checked only the upper bound before indexing the fragments array, allowing a negative index to be used and causing an out-of-bounds read. A malicious or misconfigured DASH server can trigger this by serving a live manifest with a decreasing startNumber across a manifest refresh.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Ubuntu:Pro:14.04:LTS libav

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:18.04:LTS ffmpeg

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7:3.4.11-0ubuntu0.1+esm15"}]}]

Ubuntu:Pro:20.04:LTS ffmpeg

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7:4.2.7-0ubuntu0.1+esm16"}]}]

Ubuntu:Pro:22.04:LTS ffmpeg

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7:4.4.2-0ubuntu0.22.04.1+esm15"}]}]

Ubuntu:Pro:24.04:LTS ffmpeg

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7:6.1.1-3ubuntu5+esm13"}]}]

Ubuntu:26.10 ffmpeg

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:26.04:LTS ffmpeg

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7:8.0.1-3ubuntu2+esm4"}]}]

References

advisory ubuntu.com
advisory ubuntu.com
report ubuntu.com
report cve.org
report code.ffmpeg.org