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CVE PROGRAM SOURCE RECORDUnscored

CVE-2024-49872

mm/gup: fix memfd_pin_folios alloc race panic

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: mm/gup: fix memfd_pin_folios alloc race panic If memfd_pin_folios tries to create a hugetlb page, but someone else already did, then folio gets the value -EEXIST here: folio = memfd_alloc_folio(memfd, start_idx); if (IS_ERR(folio)) { ret = PTR_ERR(folio); if (ret != -EEXIST) goto err; then on the next trip through the "while start_idx" loop we panic here: if (folio) { folio_put(folio); To fix, set the folio to NULL on error.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 89c1905d9c140372b7f50ef48f42378cf85d9bc5 to < e28f39b359c0cfdcc011603e51187085a5f1e5e3affected
  • 89c1905d9c140372b7f50ef48f42378cf85d9bc5 to < ce645b9fdc78ec5d28067286e92871ddae6817d5affected

Linux Linux

Default version status: affected

  • 6.11affected
  • 0 to < 6.11unaffected
  • 6.11.3 to ≤ 6.11.*unaffected
  • 6.12 to ≤ *unaffected

References