{"id":"CVE-2021-26381","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-26381","generatedAt":"2026-10-27T22:26:47.225Z","title":"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.","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.","published":"2026-02-10T20:16:41.000Z","lastModified":"2026-06-17T03:43:17.000Z","status":"Deferred","sourceIdentifier":"psirt@amd.com","cvss":{"version":"4.0","score":7.1,"severity":"HIGH","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/M"},"cwe":["CWE-770"],"affected":[],"epss":{"score":0.00164,"percentile":0.05599,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.16%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-4013.html","source":"psirt@amd.com"},{"url":"https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-6024.html","source":"psirt@amd.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-26381","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}