Security Advisory 2026-0022 (CVE-2026-39043)
| Summary | Heap buffer overflow in Matroska demuxer |
| Date | 2026-04-07 |
| Affected Versions | GStreamer gst-plugins-good < 1.28.2 |
| IDs | GStreamer-SA-2026-0022 CVE-2026-39043 |
Details
Heap buffer overflow in the Matroska (MKV) demuxer when calculating decompressed buffer sizes for bz2-compressed tracks. The issue occurs due to missing parentheses in the buffer size calculation, causing incorrect memory allocation and potential out-of-bounds writes.
Impact
A malicious third party could trigger a heap buffer overflow by providing a crafted Matroska file with bz2-compressed data. This could result in application crash or arbitrary code execution.
Solution
The gst-plugins-good 1.28.2 release addresses the issue. People using older versions of GStreamer should apply the patch and recompile.