{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cve-2026-21375/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[{"cvss":7.8,"id":"CVE-2026-21375"}],"_cs_exploited":false,"_cs_products":[],"_cs_severities":["high"],"_cs_tags":["cve-2026-21375","qualcomm","memory-corruption","ioctl"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eCVE-2026-21375 is a memory corruption vulnerability affecting certain Qualcomm chipsets. The vulnerability stems from a lack of proper size validation when accessing an output buffer during IOCTL (Input/Output Control) processing. This flaw, disclosed in the April 2026 Qualcomm security bulletin, allows a local attacker with limited privileges to potentially overwrite memory, leading to denial of service or even arbitrary code execution. Successful exploitation requires a malicious application or process to interact with the vulnerable IOCTL interface on the target device. The vulnerability is classified as a buffer over-read (CWE-126).\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eA malicious application is installed on a device with a vulnerable Qualcomm chipset.\u003c/li\u003e\n\u003cli\u003eThe application gains the necessary permissions to interact with the device driver via IOCTL calls.\u003c/li\u003e\n\u003cli\u003eThe malicious application crafts a specific IOCTL request with a small output buffer size.\u003c/li\u003e\n\u003cli\u003eThe device driver processes the IOCTL request but fails to properly validate the output buffer size against the actual data being written.\u003c/li\u003e\n\u003cli\u003eThe driver attempts to write data exceeding the allocated buffer size.\u003c/li\u003e\n\u003cli\u003eThe excess data overwrites adjacent memory regions in kernel space.\u003c/li\u003e\n\u003cli\u003eThis memory corruption can lead to a crash or, with careful manipulation, arbitrary code execution.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-21375 can result in a denial-of-service condition, where the device becomes unstable or unresponsive. In more severe scenarios, a local attacker could leverage the memory corruption to achieve arbitrary code execution with elevated privileges. Given the widespread use of Qualcomm chipsets in mobile devices and embedded systems, the potential impact could affect millions of devices globally.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApply the security patches released by Qualcomm as detailed in the April 2026 security bulletin to remediate CVE-2026-21375.\u003c/li\u003e\n\u003cli\u003eMonitor process creation events for suspicious processes attempting to interact with device drivers, using the provided Sigma rule.\u003c/li\u003e\n\u003cli\u003eImplement runtime validation of IOCTL buffer sizes within kernel drivers to prevent buffer overflows (mitigation, not detection).\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-06T16:16:30Z","date_published":"2026-04-06T16:16:30Z","id":"/briefs/2026-04-qualcomm-ioctl-memory-corruption/","summary":"CVE-2026-21375 is a memory corruption vulnerability in Qualcomm chipsets due to insufficient output buffer size validation during IOCTL processing, potentially leading to arbitrary code execution.","title":"Qualcomm IOCTL Memory Corruption Vulnerability (CVE-2026-21375)","url":"https://feed.craftedsignal.io/briefs/2026-04-qualcomm-ioctl-memory-corruption/"}],"language":"en","title":"CraftedSignal Threat Feed — Cve-2026-21375","version":"https://jsonfeed.org/version/1.1"}