| Name | CVE-2026-73433 |
| Description | A flaw was found in GStreamer gst-plugins-good (avidemux). When parsing FUJIFILM metadata in an AVI strd chunk, gst_avi_demux_parse_strd() decrements a remaining-length counter by fixed offsets (98 and 10 bytes) without verifying sufficient data remains. For crafted strd payloads of exactly 106 or 107 bytes, the counter underflows to a very large unsigned value, causing subsequent null-terminated string scanning to read far beyond the allocated heap buffer. Date-format normalization may also write beyond the buffer end. Confirmed impacts include heap out-of-bounds read, out-of-bounds write, heap information disclosure (adjacent data appearing in parsed metadata), and application crash/denial of service. The avidemux element is auto-plugged by playbin, decodebin, and gst-discoverer, so opening or previewing a crafted AVI is sufficient to trigger the issue. Fixed upstream in gst-plugins-good 1.28.6 (GStreamer-SA-2026-0072). |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| gst-plugins-good1.0 (PTS) | bullseye | 1.18.4-2+deb11u2 | vulnerable |
| bullseye (security) | 1.18.4-2+deb11u4 | vulnerable | |
| bookworm | 1.22.0-5+deb12u3 | vulnerable | |
| bookworm (security) | 1.22.0-5+deb12u2 | vulnerable | |
| trixie (security), trixie | 1.26.2-1+deb13u2 | vulnerable | |
| forky, sid | 1.28.6-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| gst-plugins-good1.0 | source | (unstable) | 1.28.6-1 |
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/12231
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/12241
Fixed by: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/e7532e5fe967f83c865bea3bbbf363a6d80884a0 (1.26.8)
Fixed by: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/6caf1b70cebdcd0fc0bbeb4ba626a5e60c1004a4 (1.26.8)
Fixed by: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/91a9ba7d13ebd5ca4b994e27bb86d900590498e5 (1.26.8)
Fixed by: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/178ce3841f47c14d2acd7fbca153b738eddc488e (1.26.8)
Fixed by: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/9ea9ae4837efc4b105438c4e6c10c2ab2be1b270 (1.26.8)
Fixed by: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/c429d2a33496b54b8e6c00dbf1fdc4e3f52d8481 (1.26.8)
https://gstreamer.freedesktop.org/security/sa-2026-0072.html