CVE-2024-27007

2024-05-0106:15:19

416baaa9-dc9f-4396-8d5f-8c081fb06d67

web.nvd.nist.gov

linux kernel vulnerability

userfaultfd

src_folio

uffdio_move

page-table

memory corruption

huge-page case

7.4 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

9.2%

JSON

In the Linux kernel, the following vulnerability has been resolved:

userfaultfd: change src_folio after ensuring it’s unpinned in UFFDIO_MOVE

Commit d7a08838ab74 (“mm: userfaultfd: fix unexpected change to src_folio
when UFFDIO_MOVE fails”) moved the src_folio->{mapping, index} changing to
after clearing the page-table and ensuring that it’s not pinned. This
avoids failure of swapout+migration and possibly memory corruption.

However, the commit missed fixing it in the huge-page case.