CVE-2021-47087 Information

Description

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.

Reference

https://git.kernel.org/stable/c/806142c805cacd098e61bdc0f72c778a2389fe4a https://git.kernel.org/stable/c/ad338d825e3f7b96ee542bf313728af2d19fe9ad https://git.kernel.org/stable/c/91e94e42f6fc49635f1a16d8ae3f79552bcfda29 https://git.kernel.org/stable/c/18549bf4b21c739a9def39f27dcac53e27286ab5