{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/tags/kernel-mode-driver/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":7.8,"id":"CVE-2026-40408"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Windows Kernel-Mode Drivers"],"_cs_severities":["high"],"_cs_tags":["cve","privilege escalation","kernel-mode driver"],"_cs_type":"advisory","_cs_vendors":["Microsoft"],"content_html":"\u003cp\u003eCVE-2026-40408 is a critical use-after-free vulnerability residing within Windows Kernel-Mode Drivers. This flaw allows an attacker, who has already gained authorized access to a system, to escalate their privileges to a higher level, potentially SYSTEM. This means the attacker could then execute arbitrary code with elevated rights, compromise the integrity of the operating system, and gain complete control over the targeted machine. Given the ubiquitous nature of Kernel-Mode Drivers in Windows operating systems, a successful exploit could have widespread implications, affecting a substantial number of systems across diverse environments.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker gains initial access to the system with limited privileges through legitimate or compromised credentials.\u003c/li\u003e\n\u003cli\u003eThe attacker identifies a specific vulnerable Kernel-Mode Driver affected by the use-after-free vulnerability (CVE-2026-40408).\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious application or script designed to interact with the vulnerable driver.\u003c/li\u003e\n\u003cli\u003eThe malicious application triggers the use-after-free condition within the driver, likely by freeing a memory object while retaining a pointer to it.\u003c/li\u003e\n\u003cli\u003eThe attacker manipulates the freed memory, replacing it with attacker-controlled data.\u003c/li\u003e\n\u003cli\u003eThe driver attempts to access the attacker-controlled memory as if it were the original object.\u003c/li\u003e\n\u003cli\u003eThis access results in the execution of arbitrary code provided by the attacker within the kernel context.\u003c/li\u003e\n\u003cli\u003eThe attacker escalates privileges to SYSTEM, gaining complete control over the system.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-40408 leads to local privilege escalation, granting an attacker complete control over the compromised Windows system. This includes the ability to install malware, steal sensitive data, modify system configurations, and potentially use the compromised system as a launchpad for lateral movement within the network. Given the widespread use of Windows Kernel-Mode Drivers, a successful exploit could impact a large number of systems across various sectors.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApply the security update released by Microsoft to patch CVE-2026-40408 as soon as possible (reference: \u003ca href=\"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40408)\"\u003ehttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40408)\u003c/a\u003e.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule \u0026ldquo;Detect Potential CVE-2026-40408 Exploitation Attempt via Suspicious Driver Loading\u0026rdquo; to identify potential exploitation attempts.\u003c/li\u003e\n\u003cli\u003eEnable driver verifier to detect and diagnose memory corruption issues in Kernel-Mode Drivers.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-12T18:48:11Z","date_published":"2026-05-12T18:48:11Z","id":"https://feed.craftedsignal.io/briefs/2026-05-cve-2026-40408/","summary":"CVE-2026-40408 is a use-after-free vulnerability in Windows Kernel-Mode Drivers, enabling a locally authenticated attacker to elevate privileges.","title":"CVE-2026-40408 — Windows Kernel-Mode Drivers Use-After-Free Privilege Escalation","url":"https://feed.craftedsignal.io/briefs/2026-05-cve-2026-40408/"},{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":8,"id":"CVE-2026-34332"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Windows Kernel-Mode Drivers"],"_cs_severities":["high"],"_cs_tags":["cve","use-after-free","kernel-mode driver","rce"],"_cs_type":"advisory","_cs_vendors":["Microsoft"],"content_html":"\u003cp\u003eCVE-2026-34332 is a use-after-free vulnerability present in Windows Kernel-Mode Drivers. This vulnerability allows an authorized attacker to execute arbitrary code over a network. The vulnerability stems from improper memory management within the kernel drivers, where freed memory is accessed again, leading to potential code execution. Successful exploitation requires an attacker to be authorized, implying some level of system access or privilege. The vulnerability was reported to Microsoft and assigned a CVSS v3.1 score of 8.0, indicating a high severity. This vulnerability could allow for remote code execution within the kernel, giving the attacker a high level of control over the system.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker gains authorized access to a system. This could be through compromised credentials or other means.\u003c/li\u003e\n\u003cli\u003eAttacker sends a specially crafted network packet to the targeted system.\u003c/li\u003e\n\u003cli\u003eThe network packet interacts with a vulnerable Kernel-Mode Driver.\u003c/li\u003e\n\u003cli\u003eThe driver attempts to access a memory location that has already been freed.\u003c/li\u003e\n\u003cli\u003eDue to the use-after-free vulnerability, the attacker can potentially control the contents of the freed memory.\u003c/li\u003e\n\u003cli\u003eThe driver executes code from the attacker-controlled memory.\u003c/li\u003e\n\u003cli\u003eThe attacker gains code execution within the kernel.\u003c/li\u003e\n\u003cli\u003eThe attacker leverages kernel access to perform privileged actions, such as installing malware, exfiltrating data, or disrupting system operations.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-34332 allows an authorized attacker to execute arbitrary code within the Windows kernel. This can lead to a complete compromise of the affected system, potentially impacting confidentiality, integrity, and availability. An attacker with kernel-level access can install persistent backdoors, steal sensitive information, or cause a denial-of-service condition. The exact number of potential victims and targeted sectors is unknown, but given the ubiquitous nature of Windows, the vulnerability poses a significant threat.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMonitor network traffic for suspicious packets targeting Kernel-Mode Drivers.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rules provided below to your SIEM to detect potential exploitation attempts of CVE-2026-34332.\u003c/li\u003e\n\u003cli\u003eInvestigate any alerts triggered by the Sigma rules, focusing on network connections and process creation events related to kernel drivers.\u003c/li\u003e\n\u003cli\u003eConsult Microsoft\u0026rsquo;s security advisory for CVE-2026-34332 for specific mitigation steps and patch information available at \u003ca href=\"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34332\"\u003ehttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34332\u003c/a\u003e.\u003c/li\u003e\n\u003cli\u003eEnable Driver Verifier to detect memory corruption issues early.\u003c/li\u003e\n\u003cli\u003eConsider network segmentation to limit the impact of a successful exploit.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-12T18:22:01Z","date_published":"2026-05-12T18:22:01Z","id":"https://feed.craftedsignal.io/briefs/2026-05-cve-2026-34332/","summary":"CVE-2026-34332 is a use-after-free vulnerability in Windows Kernel-Mode Drivers that allows an authorized attacker to execute code over a network.","title":"CVE-2026-34332: Use-After-Free Vulnerability in Windows Kernel-Mode Drivers","url":"https://feed.craftedsignal.io/briefs/2026-05-cve-2026-34332/"}],"language":"en","title":"CraftedSignal Threat Feed — Kernel-Mode Driver","version":"https://jsonfeed.org/version/1.1"}