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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-89710

NFSv4.1: fix layout segment leak on the pnfs_layout_process() forget path

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: NFSv4.1: fix layout segment leak on the pnfs_layout_process() forget path When the server returns a new layout stateid while a valid one is still held, pnfs_layout_process() calls pnfs_mark_matching_lsegs_return() on the on-stack free_me list and jumps to out_forget. Segments whose reference count drops to zero are unlinked from lo->plh_segs and moved to free_me by mark_lseg_invalid(); for an idle cached segment the layout header holds the only reference, so this happens on the first decrement. out_forget never drains free_me -- only the success path calls pnfs_free_lseg_list(). Commit 814b84971388 ("pNFS/NFSv4: Fix a layout segment leak in pnfs_layout_process()") added the drain; commit 08bd8dbe8882 ("pNFS/NFSv4: Try to return invalid layout in pnfs_layout_process()") removed it while switching the destination to lo->plh_return_segs, which is drained elsewhere. Commit fb700ef02676 ("NFSv4.1: Simplify layout return in pnfs_layout_process()") switched the destination back to free_me without restoring the drain. Restore the pnfs_free_lseg_list() call.

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

  • fb700ef026766c95578aafc0db1b208946e7ad4f to < f52188118d319b47d49ee91a897f6afda4879c59affected
  • fb700ef026766c95578aafc0db1b208946e7ad4f to < ad3e41855325e55623276660ef20fbc3b8ba087faffected
  • fb700ef026766c95578aafc0db1b208946e7ad4f to < a080bb69d30f11738d753a60d1eb733d627c2093affected
  • fb700ef026766c95578aafc0db1b208946e7ad4f to < 7c5b0e813efd9124760d5fd1bfc6b229f03fb1a2affected
  • fb700ef026766c95578aafc0db1b208946e7ad4f to < 36e3f13bf0728f4ce11ee8904cec82a783222f62affected
  • fb700ef026766c95578aafc0db1b208946e7ad4f to < 32ac1b0b7f1cfa0d1a1faf9c72f4154046101070affected
  • fb700ef026766c95578aafc0db1b208946e7ad4f to < ee5a386cfe60f3f8286de16a9db8e1a08f0bc124affected

Linux Linux

Default version status: affected

  • 5.13affected
  • 0 to < 5.13unaffected
  • 5.15.221 to ≤ 5.15.*unaffected
  • 6.1.188 to ≤ 6.1.*unaffected
  • 6.6.157 to ≤ 6.6.*unaffected
  • 6.12.109 to ≤ 6.12.*unaffected
  • 6.18.50 to ≤ 6.18.*unaffected
  • 7.2.4 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References