--- id: CVE-2026-73433 title: A flaw was found in GStreamer gst-plugins-good (avidemux) summary: >- 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 suffici… severity: medium cvss: 6.6 cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H' cwe: - CWE-191 vendor: gstreamer product: gstreamer affected: - gstreamer <= 1.28.6 - enterprise_linux = 7.0 - enterprise_linux = 8.0 - enterprise_linux = 9.0 - enterprise_linux = 10.0 patched: - enterprise_linux_appstream_eus_v_10_0 - enterprise_linux_appstream_v_10 - enterprise_linux_appstream_v_8 - enterprise_linux_appstream_e4s_v_9_2 - enterprise_linux_appstream_v_9 published: '2026-08-12' updated: '2026-09-23' sourceUpdated: '2026-09-23T15:17:17.003' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73433' references: - url: 'https://access.redhat.com/errata/RHSA-2026:55434' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:55436' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:56966' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:65959' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:68642' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:68644' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:68645' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:69232' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:70264' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:70584' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:70803' label: secalert@redhat.com - url: 'https://access.redhat.com/security/cve/CVE-2026-73433' label: secalert@redhat.com - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2514801' label: secalert@redhat.com - url: 'https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/12231' label: secalert@redhat.com - url: 'https://gstreamer.freedesktop.org/security/sa-2026-0072.html' label: secalert@redhat.com - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-73433.json - url: 'https://www.cve.org/CVERecord?id=CVE-2026-73433' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73433' tags: - nvd - cve.org - csaf - vex - red-hat ssvc: exploitation: none automatable: 'no' technicalImpact: partial timestamp: '2026-08-14T21:57:51.529936Z' epss: 0.00148 epssPercentile: 0.03338 ingestedAt: '2026-09-12T16:32:02.467Z' --- ## Overview 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 - `gstreamer <= 1.28.6` - `enterprise_linux = 7.0` - `enterprise_linux = 8.0` - `enterprise_linux = 9.0` - `enterprise_linux = 10.0` ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges. ## Vendor advisories - **RHSA-2026:65959** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0) · released 2026-09-09 · [advisory](https://access.redhat.com/errata/RHSA-2026:65959) - **RHSA-2026:55434** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10) · released 2026-08-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:55434) - **RHSA-2026:56966** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8) · released 2026-08-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:56966) - **RHSA-2026:68645** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.2) · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:68645) - **RHSA-2026:55436** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2026-08-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:55436) - **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 7 · no fix planned: Red Hat Enterprise Linux 7 · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-73433.json) - **RHSA-2026:68642** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.4) · released 2026-09-18 · [advisory](https://access.redhat.com/errata/RHSA-2026:68642) - **RHSA-2026:68644** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6) · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:68644) - **RHSA-2026:69232** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8) · released 2026-09-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:69232) - **RHSA-2026:70264** · Red Hat · fixed in: Red Hat Enterprise Linux Server (v. 7 ELS) · released 2026-09-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:70264) - **RHSA-2026:70803** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) · released 2026-09-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:70803) - **RHSA-2026:70584** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) · released 2026-09-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:70584)