cve/2021/CVE-2021-47567.md

CVE-2021-47567

Description

In the Linux kernel, the following vulnerability has been resolved:powerpc/32: Fix hardlockup on vmap stack overflowSince the commit c118c7303ad5 ("powerpc/32: Fix vmap stack - Do notactivate MMU before reading task struct") a vmap stack overflowresults in a hard lockup. This is because emergency_ctx is stilladdressed with its virtual address allthough data MMU is not activeanymore at that time.Fix it by using a physical address instead.

POC

Reference

No PoCs from references.

Github

• https://github.com/fkie-cad/nvd-json-data-feeds