CVE-2021-47087: Linux Kernel

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: tee: optee: Fix incorrect page free bug Pointer to the allocated pages (struct page *page) has already progressed towards the end of allocation. It is incorrect to perform __free_pages(page, order) using this pointer as we would free any arbitrary pages. Fix this by stop modifying the page pointer.

Affected products

• Linux Linux Kernel: from 5.4.140, before 5.4.169 (fixed in 5.4.169); from 5.10.58, before 5.10.89 (fixed in 5.10.89); from 5.14, before 5.15.12 (fixed in 5.15.12); version 5.16 only

Published 2024-03-04. Last modified 2026-08-04.