CVE WatchJul 24, 2026

CVE-2026-66036

FFmpeg through 8.1.2, fixed in commit 5d7112c, contains a heap out-of-bounds write vulnerability in the vf_hqdn3d filter that allows attacke

CVSS

8.8

High

EPSS

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KEV

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Exploit Today

0-100

Published: Jul 24, 2026 · Last modified: Jul 24, 2026 · CWE-122

EPSS · 30d

Not enough EPSS history yet.

Technical description

FFmpeg through 8.1.2, fixed in commit 5d7112c, contains a heap out-of-bounds write vulnerability in the vf_hqdn3d filter that allows attackers to corrupt heap memory by supplying a crafted video whose frame resolution increases between frames when filtergraph reinitialization is disabled via the -reinit_filter 0 option. Attackers can provide a malicious video input where vf_hqdn3d.config_input() allocates undersized per-plane line-history buffers based on the initial frame width, and subsequent larger frames cause denoise_spatial() to write beyond the allocation boundary, resulting in heap memory corruption.

Official references

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