Medium [CVE-2026-65705] Arbitrary code execution via out-of-bounds write in vf_floodfill video filter
This medium-severity Red Hat Linux advisory covers CVE-2026-65705 affecting Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat OpenShift AI (RHOAI).
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Summary
FFmpeg versions 3.4 through 8.1.2 contain an out-of-bounds write vulnerability in the vf_floodfill video filter that allows attackers to corrupt heap memory by supplying a dynamically sized video stream with filtergraph reinitialization disabled via -reinit_filter 0.
When config_input() allocates the points traversal stack based on initial frame dimensions and a subsequent larger frame is processed, filter_frame() performs flood-fill neighbor pushes beyond the original allocation boundary, resulting in heap corruption and process crash with potential for code execution depending on heap layout and process hardening.
A flaw was found in FFmpeg. An attacker could exploit this by providing a malicious video stream, which, when processed with filtergraph reinitialization disabled, causes heap memory corruption.
This can lead to a denial of service due to a process crash, and in some cases, may enable arbitrary code execution. Red Hat Enterprise Linux has multiple layers of heap protection.
NX/DEP (Non-Executable Memory) prevents code execution from heap, thus mitigating the code execution part of the exploit. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H).
Weakness: CWE-787. Affected Red Hat products: Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift AI (RHOAI).
Red Hat does not currently list a fixing RHSA for this CVE.
- 8.1.2
Official advisory · high-confidence parse· fetched 8 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 8 days ago·verify at source
Mitigation
The source record does not include mitigation steps. That does not mean no fix exists. Read the vendor advisory below for the authoritative guidance.
Official advisory · high-confidence parse· fetched 8 days ago·verify at source
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