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CVE-2026-39211 is an integer overflow vulnerability in FFmpeg's swscale component. The issue was reportedly introduced in 2010. The available information identifies the flaw class and affected subsystem, but does not provide the specific vulnerable function, code path, trigger condition, or memory-safety consequences beyond the presence of an integer overflow. swscale is used for image scaling and pixel format conversion, so malformed or attacker-controlled media inputs that reach this processing path could potentially trigger incorrect size or arithmetic calculations during scaling operations.
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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.
Integer overflow vulnerability in FFmpeg swscale.
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.