{"cve":"CVE-2021-47389","nvd":{"published":"2024-05-21T15:15:24.330","modified":"2026-06-17T04:17:21.523","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: SVM: fix missing sev_decommission in sev_receive_start\n\nDECOMMISSION the current SEV context if binding an ASID fails after\nRECEIVE_START.  Per AMD's SEV API, RECEIVE_START generates a new guest\ncontext and thus needs to be paired with DECOMMISSION:\n\n     The RECEIVE_START command is the only command other than the LAUNCH_START\n     command that generates a new guest context and guest handle.\n\nThe missing DECOMMISSION can result in subsequent SEV launch failures,\nas the firmware leaks memory and might not able to allocate more SEV\nguest contexts in the future.\n\nNote, LAUNCH_START suffered the same bug, but was previously fixed by\ncommit 934002cd660b (\"KVM: SVM: Call SEV Guest Decommission if ASID\nbinding fails\").","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","score":5.1},"cwes":["CWE-772"],"references":["https://git.kernel.org/stable/c/efd7866e114dcb44f86d151e843f8276b7efbc67","https://git.kernel.org/stable/c/f1815e0aa770f2127c5df31eb5c2f0e37b60fa77","https://git.kernel.org/stable/c/efd7866e114dcb44f86d151e843f8276b7efbc67","https://git.kernel.org/stable/c/f1815e0aa770f2127c5df31eb5c2f0e37b60fa77"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:50:30.954589733+00:00"},"epss":{"cve":"CVE-2021-47389","score":0.00213,"percentile":0.11609,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}