{"cve":"CVE-2021-47061","nvd":{"published":"2024-02-29T23:15:07.793","modified":"2026-08-04T10:16:43.580","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU\n\nIf allocating a new instance of an I/O bus fails when unregistering a\ndevice, wait to destroy the device until after all readers are guaranteed\nto see the new null bus.  Destroying devices before the bus is nullified\ncould lead to use-after-free since readers expect the devices on their\nreference of the bus to remain valid.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-416"],"references":["https://git.kernel.org/stable/c/03c6cccedd3913006744faa252a4da5145299343","https://git.kernel.org/stable/c/2ee3757424be7c1cd1d0bbfa6db29a7edd82a250","https://git.kernel.org/stable/c/30f46c6993731efb2a690c9197c0fd9ed425da2d","https://git.kernel.org/stable/c/4e899ca848636b37e9ac124bc1723862a7d7d927","https://git.kernel.org/stable/c/03c6cccedd3913006744faa252a4da5145299343"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:46:54.846886191+00:00"},"epss":{"cve":"CVE-2021-47061","score":0.00243,"percentile":0.15483,"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."]}