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CVE-2026-2920 is a heap-based buffer overflow in the GStreamer ASF demuxer. The flaw is triggered while processing stream headers in ASF media files, where user-controlled length values are not properly validated before data is copied into a fixed-size heap buffer. This out-of-bounds write condition can corrupt heap memory and is exploitable when a crafted ASF file is parsed by an application or service using the vulnerable GStreamer component. Successful exploitation can result in arbitrary code execution in the context of the affected process.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
10 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.