{"cve":"CVE-2021-47110","nvd":{"published":"2024-03-15T21:15:06.530","modified":"2026-06-17T04:16:30.913","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/kvm: Disable kvmclock on all CPUs on shutdown\n\nCurrenly, we disable kvmclock from machine_shutdown() hook and this\nonly happens for boot CPU. We need to disable it for all CPUs to\nguard against memory corruption e.g. on restore from hibernate.\n\nNote, writing '0' to kvmclock MSR doesn't clear memory location, it\njust prevents hypervisor from updating the location so for the short\nwhile after write and while CPU is still alive, the clock remains usable\nand correct so we don't need to switch to some other clocksource.","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:N/A:H","score":7.1},"cwes":["CWE-459"],"references":["https://git.kernel.org/stable/c/1df2dc09926f61319116c80ee85701df33577d70","https://git.kernel.org/stable/c/3b0becf8b1ecf642a9edaf4c9628ffc641e490d6","https://git.kernel.org/stable/c/9084fe1b3572664ad276f427dce575f580c9799a","https://git.kernel.org/stable/c/c02027b5742b5aa804ef08a4a9db433295533046","https://git.kernel.org/stable/c/1df2dc09926f61319116c80ee85701df33577d70"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:46:54.846886191+00:00"},"epss":{"cve":"CVE-2021-47110","score":0.00243,"percentile":0.15559,"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."]}