Bug 2506586 (CVE-2026-65706)

Summary:	CVE-2026-65706 FFmpeg: FFmpeg: Arbitrary Code Execution via Crafted Video Frame
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bbrownin
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in FFmpeg. This vulnerability, an out-of-bounds write in the vf_swaprect video filter, allows an attacker to corrupt heap memory. By providing a specially crafted NV12 video frame with specific dimensions, a local user can trigger a memory corruption, leading to a process crash. This could potentially result in arbitrary code execution, compromising the system's confidentiality, integrity, and availability.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-07-23 20:02:04 UTC

FFmpeg versions 3.0 through 8.1.2 contain an out-of-bounds write vulnerability in the vf_swaprect video filter that allows attackers to corrupt heap memory by supplying a crafted NV12 video frame with odd width dimensions. The filter_frame() function reuses a temporary row buffer sized for plane 0's single-byte pixel step across all planes, causing an 18-byte memcpy into a 17-byte heap allocation when processing the two-byte-per-sample interleaved chroma plane of a 17x16 NV12 frame, resulting in heap corruption and process crash with potential for code execution.