{"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":0.04403,"ingestedAt":"2026-09-12T16:32:02.467Z","slug":"CVE-2026-73433","body":"## Overview\n\nA 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).\n\n## Affected\n\n- `gstreamer <= 1.28.6`\n- `enterprise_linux = 7.0`\n- `enterprise_linux = 8.0`\n- `enterprise_linux = 9.0`\n- `enterprise_linux = 10.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":36.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}