{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/actors/qualcomm/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":["Qualcomm"],"_cs_cves":[{"cvss":7.8,"id":"CVE-2026-21372"}],"_cs_exploited":false,"_cs_products":[],"_cs_severities":["high"],"_cs_tags":["cve-2026-21372","memory-corruption","heap-overflow","ioctl"],"_cs_type":"threat","_cs_vendors":[],"content_html":"\u003cp\u003eCVE-2026-21372 describes a memory corruption vulnerability affecting systems that handle IOCTL requests, specifically during memcpy operations. The vulnerability arises when the system does not properly validate buffer sizes, leading to a heap-based buffer overflow (CWE-122). This flaw can be triggered by sending IOCTL requests with invalid buffer sizes, potentially allowing an attacker with local access to execute arbitrary code or cause a denial-of-service condition. Qualcomm reported this vulnerability in their April 2026 security bulletin. Successful exploitation requires the attacker to have the ability to send specifically crafted IOCTL requests to the vulnerable driver or service.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker gains local access to the system.\u003c/li\u003e\n\u003cli\u003eAttacker identifies the vulnerable driver or service that processes IOCTL requests.\u003c/li\u003e\n\u003cli\u003eAttacker crafts a malicious IOCTL request with an invalid buffer size, specifically designed to trigger a buffer overflow during a memcpy operation.\u003c/li\u003e\n\u003cli\u003eAttacker sends the crafted IOCTL request to the vulnerable driver or service.\u003c/li\u003e\n\u003cli\u003eThe driver or service attempts to copy data into a buffer using memcpy, without properly validating the size of the input buffer.\u003c/li\u003e\n\u003cli\u003eDue to the invalid buffer size, the memcpy operation writes beyond the allocated buffer, causing a heap-based buffer overflow.\u003c/li\u003e\n\u003cli\u003eThe heap overflow corrupts adjacent memory regions, potentially overwriting critical data structures or code.\u003c/li\u003e\n\u003cli\u003eThe memory corruption leads to a denial-of-service condition or allows the attacker to execute arbitrary code with the privileges of the vulnerable driver or service.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-21372 allows a local attacker to cause memory corruption, potentially leading to arbitrary code execution or a denial-of-service condition. This could allow attackers to gain elevated privileges or disrupt the normal operation of the affected system. The impact is significant due to the potential for complete system compromise if code execution is achieved.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eInvestigate systems which utilize Qualcomm components for vulnerable IOCTL handlers and memcpy operations.\u003c/li\u003e\n\u003cli\u003eMonitor process execution for anomalous memory access patterns associated with drivers that handle IOCTL requests.\u003c/li\u003e\n\u003cli\u003eApply patches or updates provided by Qualcomm to address CVE-2026-21372 as detailed in the Qualcomm security bulletin (\u003ca href=\"https://docs.qualcomm.com/product/publicresources/securitybulletin/april-2026-bulletin.html)\"\u003ehttps://docs.qualcomm.com/product/publicresources/securitybulletin/april-2026-bulletin.html)\u003c/a\u003e.\u003c/li\u003e\n\u003cli\u003eImplement robust input validation for IOCTL requests to prevent buffer overflows, focusing on buffer size checks before memcpy operations.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule provided below to detect potential exploitation attempts by monitoring for processes interacting with device drivers and triggering a memcpy near the IOCTL call.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-06T16:16:29Z","date_published":"2026-04-06T16:16:29Z","id":"/briefs/2026-04-ioctl-memcpy-corruption/","summary":"A memory corruption vulnerability (CVE-2026-21372) exists when processing IOCTL requests with invalid buffer sizes leading to a heap-based buffer overflow, reported by Qualcomm with a CVSS v3.1 score of 7.8.","title":"Qualcomm IOCTL Memory Corruption Vulnerability","url":"https://feed.craftedsignal.io/briefs/2026-04-ioctl-memcpy-corruption/"}],"language":"en","title":"CraftedSignal Threat Feed — Qualcomm","version":"https://jsonfeed.org/version/1.1"}