Heap-based Buffer Overflow Affecting ffmpeg package, versions [0,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published28 Jul 2026
- disclosed27 Jul 2026
- creditUnknown
Introduced: 27 Jul 2026
NewCVE-2026-66036 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow in the config_input() and denoise_spatial() functions of the vf_hqdn3d filter, which sizes its working buffers for the initial frame dimensions and does not resize them when a later frame is larger. An attacker can corrupt heap memory, which can lead to code execution, by supplying a video whose frame resolution increases between frames while the hqdn3d filter runs with filtergraph reinitialization disabled. Exploitation requires the filtergraph to use hqdn3d with the non-default -reinit_filter 0 option, since the default reinitialization behavior reconfigures the filter on a size change and avoids the overflow.