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

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-89710

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-89710

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "fb700ef026766c95578aafc0db1b208946e7ad4f",
        "lessThan": "f52188118d319b47d49ee91a897f6afda4879c59",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fb700ef026766c95578aafc0db1b208946e7ad4f",
        "lessThan": "ad3e41855325e55623276660ef20fbc3b8ba087f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fb700ef026766c95578aafc0db1b208946e7ad4f",
        "lessThan": "a080bb69d30f11738d753a60d1eb733d627c2093",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fb700ef026766c95578aafc0db1b208946e7ad4f",
        "lessThan": "7c5b0e813efd9124760d5fd1bfc6b229f03fb1a2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fb700ef026766c95578aafc0db1b208946e7ad4f",
        "lessThan": "36e3f13bf0728f4ce11ee8904cec82a783222f62",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fb700ef026766c95578aafc0db1b208946e7ad4f",
        "lessThan": "32ac1b0b7f1cfa0d1a1faf9c72f4154046101070",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fb700ef026766c95578aafc0db1b208946e7ad4f",
        "lessThan": "ee5a386cfe60f3f8286de16a9db8e1a08f0bc124",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "fs/nfs/pnfs.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.13"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.13",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.109",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.50",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.4",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "fs/nfs/pnfs.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-89710

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#35191 · Revision 1
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Publisher date
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