{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/products/ffmpeg-versions-3.0-through-8.1.2/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":7.8,"id":"CVE-2026-65706"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["FFmpeg versions 3.0 through 8.1.2"],"_cs_severities":["high"],"_cs_tags":["vulnerability","RCE","out-of-bounds-write","video-processing","FFmpeg"],"_cs_type":"advisory","_cs_vendors":["FFmpeg"],"content_html":"\u003cp\u003eA critical out-of-bounds write vulnerability, identified as CVE-2026-65706, affects FFmpeg versions 3.0 through 8.1.2. This flaw resides within the \u003ccode\u003evf_swaprect\u003c/code\u003e video filter, specifically impacting how it handles NV12 video frames with odd width dimensions. Threat actors can exploit this by supplying a specially crafted video frame, causing the \u003ccode\u003efilter_frame()\u003c/code\u003e function to perform an 18-byte \u003ccode\u003ememcpy\u003c/code\u003e operation into a 17-byte heap allocation. This discrepancy, stemming from incorrect temporary buffer sizing for interleaved chroma planes, leads to heap corruption and a subsequent process crash. Successful exploitation can enable remote code execution, granting attackers unauthorized control over the affected system. This vulnerability poses a significant risk to applications and services utilizing vulnerable FFmpeg versions for video processing, as it can be triggered by merely processing a malicious video file or stream.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAn attacker crafts a malicious NV12 video frame designed with odd width dimensions.\u003c/li\u003e\n\u003cli\u003eThe crafted video frame includes specially structured data intended to trigger an out-of-bounds write condition.\u003c/li\u003e\n\u003cli\u003eThe victim's system, running a vulnerable FFmpeg version (3.0 through 8.1.2), processes the attacker-supplied malicious NV12 video frame.\u003c/li\u003e\n\u003cli\u003eThe FFmpeg \u003ccode\u003evf_swaprect\u003c/code\u003e video filter's \u003ccode\u003efilter_frame()\u003c/code\u003e function is invoked to process the crafted frame.\u003c/li\u003e\n\u003cli\u003eDuring the processing of the two-byte-per-sample interleaved chroma plane, the \u003ccode\u003efilter_frame()\u003c/code\u003e function reuses a temporary row buffer sized for plane 0's single-byte pixel step.\u003c/li\u003e\n\u003cli\u003eThis incorrect sizing causes an 18-byte \u003ccode\u003ememcpy\u003c/code\u003e operation to occur into a 17-byte heap allocation, triggering an out-of-bounds write.\u003c/li\u003e\n\u003cli\u003eThe out-of-bounds write corrupts heap memory, leading to a process crash of the FFmpeg application or service.\u003c/li\u003e\n\u003cli\u003eWith sophisticated crafting, this heap corruption can be exploited to achieve arbitrary code execution, allowing the attacker to gain control over the affected FFmpeg process and potentially the underlying system.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-65706 results in heap memory corruption, leading to denial of service through application crashes. The vulnerability carries a high CVSS v3.1 base score of 7.8, indicating significant severity. The primary risk is the potential for remote code execution, which would allow an attacker to execute arbitrary commands and take complete control of the system running the vulnerable FFmpeg software. This could lead to data exfiltration, further network compromise, or the installation of additional malicious software. Any application or service that uses FFmpeg for video processing, including media players, video conferencing tools, transcoding services, and content management systems, is at risk. The number of potential victims is vast due to the widespread use of FFmpeg across various industries.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePatch CVE-2026-65706 immediately by upgrading FFmpeg to a version beyond 8.1.2 that addresses this vulnerability.\u003c/li\u003e\n\u003cli\u003eMonitor systems for unexpected process crashes related to FFmpeg or media processing applications to detect potential exploitation attempts of CVE-2026-65706.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-07-23T20:22:25Z","date_published":"2026-07-23T20:22:25Z","id":"https://feed.craftedsignal.io/briefs/2026-07-ffmpeg-oob-write/","summary":"A critical out-of-bounds write vulnerability (CVE-2026-65706) exists in FFmpeg versions 3.0 through 8.1.2 within the vf_swaprect video filter, allowing attackers to corrupt heap memory and achieve potential remote code execution by providing a specially crafted NV12 video frame with odd width dimensions.","title":"Critical Out-of-Bounds Write Vulnerability in FFmpeg (CVE-2026-65706)","url":"https://feed.craftedsignal.io/briefs/2026-07-ffmpeg-oob-write/"}],"language":"en","title":"CraftedSignal Threat Feed - FFmpeg Versions 3.0 Through 8.1.2","version":"https://jsonfeed.org/version/1.1"}