{"id":"CVE-2021-26381","aliases":["EUVD-2021-13187","GHSA-99jj-mrwr-6crm"],"status":"published","title":"Improper system call parameter validation in the Trusted OS may allow a malicious driver to...","description":"Improper system call parameter validation in the Trusted OS may allow a malicious driver to perform mapping or unmapping operations on a large number of pages, potentially resulting in kernel memory corruption.","severity":{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00162,"percentile":0.05427,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-770"],"published":"2026-02-10T19:47:26Z","modified":"2026-06-17T03:43:17Z","products":[{"vendor":"amd","product":"amd athlon™ 3000 series mobile processors with radeon™ graphics"},{"vendor":"amd","product":"amd radeon™ pro v520"},{"vendor":"amd","product":"amd radeon™ pro v620"},{"vendor":"amd","product":"amd radeon™ pro w5000 series graphics products"},{"vendor":"amd","product":"amd radeon™ pro w6000 series graphics products"},{"vendor":"amd","product":"amd radeon™ rx 5000 series graphics products"},{"vendor":"amd","product":"amd radeon™ rx 6000 series graphics products"},{"vendor":"amd","product":"amd ryzen™ 3000 series desktop processors"},{"vendor":"amd","product":"amd ryzen™ 4000 series desktop processors"},{"vendor":"amd","product":"amd ryzen™ 4000 series mobile processors with radeon™ graphics"},{"vendor":"amd","product":"amd ryzen™ 5000 series desktop processors"},{"vendor":"amd","product":"amd ryzen™ 5000 series desktop processors with radeon™ graphics"},{"vendor":"amd","product":"amd ryzen™ 5000 series mobile processors with radeon™ graphics"},{"vendor":"amd","product":"amd ryzen™ embedded 5000 series processors"},{"vendor":"amd","product":"amd ryzen™ embedded r1000 series processors"},{"vendor":"amd","product":"amd ryzen™ embedded r2000 series processors"},{"vendor":"amd","product":"amd ryzen™ embedded v1000 series processors (formerly codenamed \"picasso\")"},{"vendor":"amd","product":"amd ryzen™ embedded v1000 series processors (formerly codenamed \"raven ridge\")"},{"vendor":"amd","product":"amd ryzen™ embedded v2000 series processors"},{"vendor":"amd","product":"amd ryzen™ embedded v3000 series processors"},{"vendor":"amd","product":"amd ryzen™ threadripper™ pro 3000 wx-series processors"},{"vendor":"amd","product":"amd ryzen™ threadripper™ pro 5000 wx-series processors"}],"references":[{"url":"https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-6024.html"},{"url":"https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-4013.html"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-26381"},{"url":"https://github.com/advisories/GHSA-99jj-mrwr-6crm"}],"sources":{"cve":[{"id":"CVE-2021-26381","description":"Improper system call 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corruption.","status":"published","published":"2026-02-10T21:31:30Z","modified":"2026-02-10T21:31:42Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:06:08.47148Z"}],"nvd":[{"id":"CVE-2021-26381","description":"Improper system call parameter validation in the Trusted OS may allow a malicious driver to perform mapping or unmapping operations on a large number of pages, potentially resulting in kernel memory 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