{"cve":"CVE-2021-47018","nvd":{"published":"2024-02-28T09:15:39.007","modified":"2026-06-17T04:16:12.120","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/64: Fix the definition of the fixmap area\n\nAt the time being, the fixmap area is defined at the top of\nthe address space or just below KASAN.\n\nThis definition is not valid for PPC64.\n\nFor PPC64, use the top of the I/O space.\n\nBecause of circular dependencies, it is not possible to include\nasm/fixmap.h in asm/book3s/64/pgtable.h , so define a fixed size\nAREA at the top of the I/O space for fixmap and ensure during\nbuild that the size is big enough.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/4b9fb2c9039a206d37f215936a4d5bee7b1bf9cd","https://git.kernel.org/stable/c/9ccba66d4d2aff9a3909aa77d57ea8b7cc166f3c","https://git.kernel.org/stable/c/a84df7c80bdac598d6ac9268ae578da6928883e8","https://git.kernel.org/stable/c/abb07dc5e8b61ab7b1dde20dd73aa01a3aeb183f","https://git.kernel.org/stable/c/4b9fb2c9039a206d37f215936a4d5bee7b1bf9cd"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:45:59.823092188+00:00"},"epss":{"cve":"CVE-2021-47018","score":0.00239,"percentile":0.15003,"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."]}