High [CVE-2026-66036] Arbitrary code execution via crafted video in vf_hqdn3d filter
This high-severity Red Hat Linux advisory covers CVE-2026-66036 affecting Red Hat Enterprise Linux AI 3.3 for RHEL 9, Red Hat Enterprise Linux AI 3.4 for RHEL 9, Red Hat Enterprise Linux AI 3.5 for RHEL 9.
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Summary
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. A flaw was found in FFmpeg.
A remote attacker can exploit a heap out-of-bounds write vulnerability within the `vf_hqdn3d` filter by providing a specially crafted video file. This can result in arbitrary code execution or a denial of service.
Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-787.
Affected Red Hat products: Red Hat Enterprise Linux AI 3.3 for RHEL 9; Red Hat Enterprise Linux AI 3.4 for RHEL 9; Red Hat Enterprise Linux AI 3.5 for RHEL 9; Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift AI (RHOAI). Red Hat fixing advisory: RHSA-2026:60336, RHSA-2026:60334, RHSA-2026:60335.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 11 days ago·verify at source
- 8.1.2
- ffmpeg-0:6.1.6-7.el9ai
- RHSA-2026:60336
- RHSA-2026:60334
- RHSA-2026:60335
Official advisory · high-confidence parse· fetched 11 days ago·verify at source
Mitigation
Upgrade to a fixed release: 8.1.2, ffmpeg-0:6.1.6-7.el9ai, RHSA-2026:60336, RHSA-2026:60334, RHSA-2026:60335. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 11 days ago·verify at source
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