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CVE-2026-66036

FFmpeg Heap Out-of-Bounds Write in vf_hqdn3d Filter PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
FFmpeg / FFmpegaffected 0 through 8.1.2; unaffected 5d7112c60e6f0f0742ce47d448e6da0718a70f4c

CWE

CWE-122

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.