{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cve-2026-20884/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[{"cvss":8.1,"id":"CVE-2026-20884"}],"_cs_exploited":false,"_cs_products":[],"_cs_severities":["high"],"_cs_tags":["libraw","integer-overflow","heap-buffer-overflow","cve-2026-20884"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eCVE-2026-20884 describes an integer overflow vulnerability affecting LibRaw, specifically within the \u003ccode\u003edeflate_dng_load_raw\u003c/code\u003e function. This flaw resides in commit 8dc68e2 of the LibRaw library. The vulnerability can be exploited by providing a specially crafted DNG (Digital Negative) image file to an application using the affected LibRaw version. Successful exploitation results in a heap buffer overflow, potentially allowing an attacker to execute arbitrary code or cause a denial-of-service condition. This is significant for defenders because LibRaw is a widely used library for handling raw image formats and is often integrated into image processing applications.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker crafts a malicious DNG image file designed to trigger the integer overflow in \u003ccode\u003edeflate_dng_load_raw\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003eThe victim opens the malicious DNG file using an application that utilizes the vulnerable LibRaw library.\u003c/li\u003e\n\u003cli\u003eLibRaw\u0026rsquo;s \u003ccode\u003edeflate_dng_load_raw\u003c/code\u003e function is called to process the image data.\u003c/li\u003e\n\u003cli\u003eDuring the processing of the DNG file, an integer overflow occurs when calculating the size of a buffer.\u003c/li\u003e\n\u003cli\u003eThe overflow results in allocating a smaller-than-expected buffer on the heap.\u003c/li\u003e\n\u003cli\u003eSubsequently, when decompressing the image data, the \u003ccode\u003edeflate\u003c/code\u003e algorithm writes beyond the allocated buffer, causing a heap buffer overflow.\u003c/li\u003e\n\u003cli\u003eThe heap buffer overflow overwrites adjacent memory regions, potentially corrupting program data or code.\u003c/li\u003e\n\u003cli\u003eThe attacker leverages the memory corruption to achieve arbitrary code execution or cause the application to crash.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-20884 allows an attacker to potentially execute arbitrary code within the context of the application using the LibRaw library. This could lead to complete system compromise. Alternatively, the heap buffer overflow could cause the application to crash, resulting in a denial-of-service. The impact depends on the privileges of the application using LibRaw. Image processing software, photography workflows, and digital asset management systems are all potential targets.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApply patches or upgrade to a version of LibRaw that addresses CVE-2026-20884 to remediate the vulnerability.\u003c/li\u003e\n\u003cli\u003eMonitor for applications processing DNG files from untrusted sources (e.g., web downloads or email attachments).\u003c/li\u003e\n\u003cli\u003eConsider implementing file validation and sanitization techniques to detect and prevent malicious DNG files from being processed.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule \u0026ldquo;Detect LibRaw Exploitation via DNG\u0026rdquo; to identify potential exploitation attempts.\u003c/li\u003e\n\u003cli\u003eEnable process creation logging to detect applications loading LibRaw library when processing DNG files.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-07T15:17:35Z","date_published":"2026-04-07T15:17:35Z","id":"/briefs/2026-04-libraw-integer-overflow/","summary":"CVE-2026-20884 is an integer overflow vulnerability in LibRaw's deflate_dng_load_raw function that leads to a heap buffer overflow when processing crafted DNG files.","title":"LibRaw Integer Overflow Vulnerability in deflate_dng_load_raw","url":"https://feed.craftedsignal.io/briefs/2026-04-libraw-integer-overflow/"}],"language":"en","title":"CraftedSignal Threat Feed — Cve-2026-20884","version":"https://jsonfeed.org/version/1.1"}