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CVE-2026-73433 is a memory-safety flaw in GStreamer gst-plugins-good affecting the avidemux parser while processing FUJIFILM metadata stored in AVI strd chunks. In gst_avi_demux_parse_strd(), a remaining-length counter is decremented by fixed offsets of 98 bytes and 10 bytes without first verifying that sufficient input data remains. For crafted strd payload lengths of exactly 106 or 107 bytes, this logic causes an unsigned integer underflow, turning the remaining-length value into a very large number. Subsequent null-terminated string scanning then operates past the end of the allocated heap buffer, resulting in heap out-of-bounds reads. Date-format normalization performed during parsing may also write beyond the end of the buffer, creating an out-of-bounds write condition. The flaw is reachable through the avidemux element, which is auto-plugged by common GStreamer components including playbin, decodebin, and gst-discoverer, so parsing a crafted AVI file is sufficient to trigger the vulnerability.
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12 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An unsigned integer underflow vulnerability in GStreamer avidemux FUJIFILM strd parsing that can lead to out-of-bounds read/write.
A vulnerability referenced in an Oracle Linux ELSA-2026-56966 advisory affecting Oracle Linux 8 gstreamer1-plugins-good packages. The advisory uses this CVE as the CVSS v3 score source.
An unsigned integer underflow vulnerability in gstreamer1-plugins-good during avidemux FUJIFILM strd parsing that can lead to out-of-bounds read/write.
An unsigned integer underflow in GStreamer avidemux FUJIFILM strd parsing that can lead to out-of-bounds read/write.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.