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CVE-2026-39214 is a stack buffer overflow vulnerability in FFmpeg's Service Description Table (SDT) implementation. The flaw was reportedly introduced in 2003 and remained latent for many years. Based on the available information, the issue arises from unsafe handling of attacker-controlled input in SDT parsing logic, resulting in data being written past the bounds of a stack-allocated buffer. As a memory corruption flaw in media parsing code, successful exploitation could occur when FFmpeg processes a crafted media stream or container carrying malicious SDT data.
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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.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Stack buffer overflow vulnerability in FFmpeg's SDT implementation.
One of nine FFmpeg vulnerabilities identified by an autonomous AI agent; the FFmpeg findings are described as mostly heap or stack overflows in parsers and demuxers.
One of nine CVE-backed FFmpeg vulnerabilities in a campaign spanning demuxers, muxers, codecs, RTP handling, scaling, and command-line parsing.
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.