CVE-2024-27007

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxadef440691bab824e39c1b17382322d195e1fab0 < df5f6e683e7f21a15d8be6e7a0c7a46436963ebeaffected
LinuxLinuxadef440691bab824e39c1b17382322d195e1fab0 < c0205eaf3af9f5db14d4b5ee4abacf4a583c3c50affected
LinuxLinux6.8affected
LinuxLinux0 < 6.8unaffected
LinuxLinux6.8.8 <= 6.8.*unaffected
LinuxLinux6.9 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References