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).
Affected products
gstreamer: gstreamer; redhat: enterprise linux
References10
- gstreamer.freedesktop.org/security/sa-2026-0072.html PatchVendor Advisory
- access.redhat.com/errata/RHSA-2026:55434 Third Party Advisory
- access.redhat.com/errata/RHSA-2026:55436 Third Party Advisory
- access.redhat.com/errata/RHSA-2026:56966
- access.redhat.com/errata/RHSA-2026:65959
- access.redhat.com/errata/RHSA-2026:68642
- access.redhat.com/errata/RHSA-2026:68644
- access.redhat.com/errata/RHSA-2026:68645
- access.redhat.com/errata/RHSA-2026:69232
- access.redhat.com/errata/RHSA-2026:70264
Metrics
- CVSS 3.1
-
6.6
MEDIUM
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H - EPSS — exploit probability
- 0% percentile: 4 · as of 12 November 2026
- CWE
- CWE-191
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