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CVE-2026-73433 on CTRL-OS 26.05

Aliases: CVE-2026-73433, CVE-2026-73434

Packages: gst_all_1.gst-plugins-good

Status: Plausible

Advisory Information

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).

Updates

2026-08-24 11:13 CEST

Metadata changes:

  • Status for package gst_all_1.gst-plugins-good: “Plausible”

(Amended on: 2026-08-24 11:19 CEST)

2026-08-24 11:07 CEST

Metadata changes:

  • Status for package gst_all_1.gst-plugins-good: “New”

(Amended on: 2026-08-24 11:08 CEST)