NFSv4.1: fix layout segment leak on the pnfs_layout_process() forget path
Summary
| CVE | CVE-2026-89710 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-11 20:19:58 UTC |
| Updated | 2026-09-14 13:19:20 UTC |
| 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. |
Risk And Classification
EPSS: 0.001680000 probability, percentile 0.063570000 (date 2026-09-14)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected fb700ef026766c95578aafc0db1b208946e7ad4f f52188118d319b47d49ee91a897f6afda4879c59 git | Not specified |
| CNA | Linux | Linux | affected fb700ef026766c95578aafc0db1b208946e7ad4f ad3e41855325e55623276660ef20fbc3b8ba087f git | Not specified |
| CNA | Linux | Linux | affected fb700ef026766c95578aafc0db1b208946e7ad4f a080bb69d30f11738d753a60d1eb733d627c2093 git | Not specified |
| CNA | Linux | Linux | affected fb700ef026766c95578aafc0db1b208946e7ad4f 7c5b0e813efd9124760d5fd1bfc6b229f03fb1a2 git | Not specified |
| CNA | Linux | Linux | affected fb700ef026766c95578aafc0db1b208946e7ad4f 36e3f13bf0728f4ce11ee8904cec82a783222f62 git | Not specified |
| CNA | Linux | Linux | affected fb700ef026766c95578aafc0db1b208946e7ad4f 32ac1b0b7f1cfa0d1a1faf9c72f4154046101070 git | Not specified |
| CNA | Linux | Linux | affected fb700ef026766c95578aafc0db1b208946e7ad4f ee5a386cfe60f3f8286de16a9db8e1a08f0bc124 git | Not specified |
| CNA | Linux | Linux | affected 5.13 | Not specified |
| CNA | Linux | Linux | unaffected 5.13 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.221 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.188 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.157 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.109 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.50 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.4 7.2.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/36e3f13bf0728f4ce11ee8904cec82a783222f62 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/32ac1b0b7f1cfa0d1a1faf9c72f4154046101070 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/ee5a386cfe60f3f8286de16a9db8e1a08f0bc124 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/f52188118d319b47d49ee91a897f6afda4879c59 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a080bb69d30f11738d753a60d1eb733d627c2093 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/ad3e41855325e55623276660ef20fbc3b8ba087f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/7c5b0e813efd9124760d5fd1bfc6b229f03fb1a2 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.