VDB
RHSA-2026:55434
RHSA-2026:55434
PUBLISHED
CVSS 6.099999904632568 MEDIUM
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).
Risk Scores
CVSS 3.1
6.099999904632568
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | gstreamer1-plugins-good-0:1.26.7-2.el10_2.5.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10) | 1.26.7-2.el10 |
| Red Hat | gstreamer1-plugins-good-qt6-debuginfo-0:1.26.7-2.el10_2.5.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10) | 1.26.7-2.el10 |
| Red Hat | gstreamer1-plugins-good-0:1.26.7-2.el10_2.5.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10) | 1.26.7-2.el10 |
| Red Hat | gstreamer1-plugins-good-gtk-0:1.26.7-2.el10_2.5.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10) | 1.26.7-2.el10 |
| Red Hat | gstreamer1-plugins-good-gtk-0:1.26.7-2.el10_2.5.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10) | 1.26.7-2.el10 |
| Red Hat | gstreamer1-plugins-good-0:1.26.7-2.el10_2.5.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10) | 1.26.7-2.el10 |
| Red Hat | gstreamer1-plugins-good-qt6-debuginfo-0:1.26.7-2.el10_2.5.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10) | 1.26.7-2.el10 |
| Red Hat | gstreamer1-plugins-good-0:1.26.7-2.el10_2.5.src as a component of Red Hat Enterprise Linux AppStream (v. 10) | 1.26.7-2.el10 |
| Red Hat | gstreamer1-plugins-good-gtk-debuginfo-0:1.26.7-2.el10_2.5.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10) | 1.26.7-2.el10 |
| Red Hat | gstreamer1-plugins-good-debuginfo-0:1.26.7-2.el10_2.5.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10) | 1.26.7-2.el10 |
| Red Hat | gstreamer1-plugins-good-qt6-debuginfo-0:1.26.7-2.el10_2.5.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10) | 1.26.7-2.el10 |
| Red Hat | gstreamer1-plugins-good-debuginfo-0:1.26.7-2.el10_2.5.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10) | 1.26.7-2.el10 |
| Red Hat | gstreamer1-plugins-good-debugsource-0:1.26.7-2.el10_2.5.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10) | 1.26.7-2.el10 |
| Red Hat | gstreamer1-plugins-good-qt6-debuginfo-0:1.26.7-2.el10_2.5.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10) | 1.26.7-2.el10 |
| Red Hat | gstreamer1-plugins-good-gtk-debuginfo-0:1.26.7-2.el10_2.5.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10) | 1.26.7-2.el10 |
| Red Hat | gstreamer1-plugins-good-0:1.26.7-2.el10_2.5.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10) | 1.26.7-2.el10 |
| Red Hat | gstreamer1-plugins-good-debuginfo-0:1.26.7-2.el10_2.5.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10) | 1.26.7-2.el10 |
| Red Hat | gstreamer1-plugins-good-debuginfo-0:1.26.7-2.el10_2.5.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10) | 1.26.7-2.el10 |
| Red Hat | gstreamer1-plugins-good-gtk-0:1.26.7-2.el10_2.5.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10) | 1.26.7-2.el10 |
| Red Hat | gstreamer1-plugins-good-debugsource-0:1.26.7-2.el10_2.5.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10) | 1.26.7-2.el10 |
…and 5 more
Timeline
- Aug 17, 2026 CVE Published
- Sep 9, 2026 CVE Updated
- Sep 9, 2026 Distribution Patch
- Sep 9, 2026 Distribution Patch
- Sep 9, 2026 Security Advisory
- Sep 9, 2026 Security Advisory
- Sep 9, 2026 Security Advisory
References
- https://access.redhat.com/errata/RHSA-2026:55434 advisory
- https://access.redhat.com/security/updates/classification/#moderate advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2514801 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2514807 issue
- https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_55434.json advisory
- https://access.redhat.com/security/cve/CVE-2026-73433 advisory
- https://www.cve.org/CVERecord?id=CVE-2026-73433 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-73433 advisory
- https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/12231 advisory
- https://gstreamer.freedesktop.org/security/sa-2026-0072.html advisory
- https://access.redhat.com/security/cve/CVE-2026-73434 advisory
- https://www.cve.org/CVERecord?id=CVE-2026-73434 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-73434 advisory