{"id":"CVE-2026-57851","title":"MSI KernCoreLib64.sys Privilege Escalation via IOCTL Handlers","summary":"MSI Feature Manager contains a local privilege escalation vulnerability in the KernCoreLib64.sys kernel driver that allows any locally logged-on user to perform arbitrary physical memory read/write and unrestricted I/O port operations by…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-782"],"vendor":"Micro-Star International (MSI)","product":"KernCoreLib64.sys","affected":["KernCoreLib64.sys <= 1.0.2605.1301"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-07-07T17:00:44.711176Z"},"exploitAvailable":true,"published":"2026-07-07","updated":"2026-09-24","sourceUpdated":"2026-09-24T14:17:53.654Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-57851","references":[{"url":"https://github.com/readmsr/MSI_FeatureManager_CVE","label":"MSI_FeatureManager_CVE PoC - readmsr"},{"url":"https://www.vulncheck.com/advisories/msi-gamegaraj-kerncorelib64-sys-privilege-escalation-via-ioctl-handlers"}],"tags":["cve.org","exploit-available"],"epss":0.00166,"epssPercentile":0.0524,"exploits":{"github":1,"githubRepos":["https://github.com/readmsr/MSI_FeatureManager_CVE"],"checkedAt":"2026-09-26T09:05:51.552Z"},"ingestedAt":"2026-09-24T15:45:56.727Z","slug":"CVE-2026-57851","body":"## Overview\n\nMSI Feature Manager contains a local privilege escalation vulnerability in the KernCoreLib64.sys kernel driver that allows any locally logged-on user to perform arbitrary physical memory read/write and unrestricted I/O port operations by accessing exposed IOCTL handlers without administrator privileges. Attackers can exploit the accessible device object through IOCTL handlers to manipulate kernel objects, tamper with kernel-mode callbacks, bypass Protected Process Light protections, and disable security software.\n\n## Affected\n\n- `KernCoreLib64.sys <= 1.0.2605.1301`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":55,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[]}