CVE-2024-27007 (GCVE-0-2024-27007)

Vulnerability from cvelistv5 – Published: 2024-05-01 05:29 – Updated: 2025-11-04 17:16
VLAI?
Title
userfaultfd: change src_folio after ensuring it's unpinned in UFFDIO_MOVE
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: adef440691bab824e39c1b17382322d195e1fab0 , < df5f6e683e7f21a15d8be6e7a0c7a46436963ebe (git)
Affected: adef440691bab824e39c1b17382322d195e1fab0 , < c0205eaf3af9f5db14d4b5ee4abacf4a583c3c50 (git)
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    Linux Linux Affected: 6.8
Unaffected: 0 , < 6.8 (semver)
Unaffected: 6.8.8 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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