{"cve":"CVE-2021-47087","nvd":{"published":"2024-03-04T18:15:07.457","modified":"2026-08-04T10:16:44.987","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntee: optee: Fix incorrect page free bug\n\nPointer to the allocated pages (struct page *page) has already\nprogressed towards the end of allocation. It is incorrect to perform\n__free_pages(page, order) using this pointer as we would free any\narbitrary pages. Fix this by stop modifying the page pointer.","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-763"],"references":["https://git.kernel.org/stable/c/18549bf4b21c739a9def39f27dcac53e27286ab5","https://git.kernel.org/stable/c/806142c805cacd098e61bdc0f72c778a2389fe4a","https://git.kernel.org/stable/c/91e94e42f6fc49635f1a16d8ae3f79552bcfda29","https://git.kernel.org/stable/c/ad338d825e3f7b96ee542bf313728af2d19fe9ad","https://git.kernel.org/stable/c/18549bf4b21c739a9def39f27dcac53e27286ab5"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:46:54.846886191+00:00"},"epss":{"cve":"CVE-2021-47087","score":0.00236,"percentile":0.14646,"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."]}