CVE-2026-89710

CVE CVE-2026-89710EUVD EUVD-2026-76622Published 2026-09-11T19:46:25.000ZLast changed 2026-09-14T12:02:09.000Z

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 0; patch: 5.15.221; fb700ef026766c95578aafc0db1b208946e7ad4f <ee5a386cfe60f3f8286de16a9db8e1a08f0bc124; patch: 7.2.4; fb700ef026766c95578aafc0db1b208946e7ad4f <ad3e41855325e55623276660ef20fbc3b8ba087f; patch: 6.12.109; patch: 6.6.157; patch: 6.1.188; fb700ef026766c95578aafc0db1b208946e7ad4f <32ac1b0b7f1cfa0d1a1faf9c72f4154046101070; fb700ef026766c95578aafc0db1b208946e7ad4f <7c5b0e813efd9124760d5fd1bfc6b229f03fb1a2; fb700ef026766c95578aafc0db1b208946e7ad4f <36e3f13bf0728f4ce11ee8904cec82a783222f62; patch: 6.18.50; patch: 7.3-rc1; 5.13; fb700ef026766c95578aafc0db1b208946e7ad4f <a080bb69d30f11738d753a60d1eb733d627c2093; fb700ef026766c95578aafc0db1b208946e7ad4f <f52188118d319b47d49ee91a897f6afda4879c59

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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