Description
A vulnerability classified as problematic was found in libav up to 12.3. Affected by this vulnerability is the function av_buffer_unref of the file libavutil/buffer.c of the component AVI File Parser. The manipulation leads to null pointer dereference. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The bug was initially reported by the researcher to the wrong project. This vulnerability only affects products that are no longer supported by the maintainer.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | libav | 12.0, 12.1, 12.2, 12.3 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | libav | No fix yet | — |
Advisories 1
- WID-SEC-2025-1728 libav: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 5, 2025
References
- VDB-318817 | libav AVI File Parser buffer.c av_buffer_unref null pointer dereference vdb-entry technical-description
- VDB-318817 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- Submit #621824 | libav avconv 13 && the newest master Segmentation fault third-party-advisory
- https://trac.ffmpeg.org/ticket/11679 issue-tracking
- https://drive.google.com/file/d/1OwDNHuTbZFNTDX9afmvez_old3oRC7dM/view?usp=sharing exploit