cve/2024/CVE-2024-27007.md

CVE-2024-27007

Description

In the Linux kernel, the following vulnerability has been resolved:userfaultfd: change src_folio after ensuring it's unpinned in UFFDIO_MOVECommit d7a08838ab74 ("mm: userfaultfd: fix unexpected change to src_foliowhen UFFDIO_MOVE fails") moved the src_folio->{mapping, index} changing toafter clearing the page-table and ensuring that it's not pinned. Thisavoids failure of swapout+migration and possibly memory corruption.However, the commit missed fixing it in the huge-page case.

POC

Reference

No PoCs from references.

Github

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