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CVE-2026-89710 (GCVE-0-2026-89710)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:46 – Updated: 2026-09-14 12:02
VLAI
Title
NFSv4.1: fix layout segment leak on the pnfs_layout_process() forget path
Summary
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: fb700ef026766c95578aafc0db1b208946e7ad4f , < f52188118d319b47d49ee91a897f6afda4879c59 (git)
Affected: fb700ef026766c95578aafc0db1b208946e7ad4f , < ad3e41855325e55623276660ef20fbc3b8ba087f (git)
Affected: fb700ef026766c95578aafc0db1b208946e7ad4f , < a080bb69d30f11738d753a60d1eb733d627c2093 (git)
Affected: fb700ef026766c95578aafc0db1b208946e7ad4f , < 7c5b0e813efd9124760d5fd1bfc6b229f03fb1a2 (git)
Affected: fb700ef026766c95578aafc0db1b208946e7ad4f , < 36e3f13bf0728f4ce11ee8904cec82a783222f62 (git)
Affected: fb700ef026766c95578aafc0db1b208946e7ad4f , < 32ac1b0b7f1cfa0d1a1faf9c72f4154046101070 (git)
Affected: fb700ef026766c95578aafc0db1b208946e7ad4f , < ee5a386cfe60f3f8286de16a9db8e1a08f0bc124 (git)
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Linux Linux Affected: 5.13
Unaffected: 0 , < 5.13 (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.109 , ≤ 6.12.* (semver)
Unaffected: 6.18.50 , ≤ 6.18.* (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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    "cveId": "CVE-2026-89710",
    "datePublished": "2026-09-11T19:46:25.534Z",
    "dateReserved": "2026-09-11T19:38:34.751Z",
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Segments whose\\nreference count drops to zero are unlinked from lo-\u003eplh_segs and moved\\nto free_me by mark_lseg_invalid(); for an idle cached segment the layout\\nheader holds the only reference, so this happens on the first decrement.\\n\\nout_forget never drains free_me -- only the success path calls\\npnfs_free_lseg_list().\\n\\nCommit 814b84971388 (\\\"pNFS/NFSv4: Fix a layout segment leak in\\npnfs_layout_process()\\\") added the drain; commit 08bd8dbe8882\\n(\\\"pNFS/NFSv4: Try to return invalid layout in pnfs_layout_process()\\\")\\nremoved it while switching the destination to lo-\u003eplh_return_segs, which\\nis drained elsewhere. Commit fb700ef02676 (\\\"NFSv4.1: Simplify layout\\nreturn in pnfs_layout_process()\\\") switched the destination back to\\nfree_me without restoring the drain.\\n\\nRestore the pnfs_free_lseg_list() call.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/nfs/pnfs.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"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\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/nfs/pnfs.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.13\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.13\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.221\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.188\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.157\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.109\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.50\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.4\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/32ac1b0b7f1cfa0d1a1faf9c72f4154046101070\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/36e3f13bf0728f4ce11ee8904cec82a783222f62\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7c5b0e813efd9124760d5fd1bfc6b229f03fb1a2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a080bb69d30f11738d753a60d1eb733d627c2093\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ad3e41855325e55623276660ef20fbc3b8ba087f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ee5a386cfe60f3f8286de16a9db8e1a08f0bc124\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f52188118d319b47d49ee91a897f6afda4879c59\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-15T04:48:52+00:00",
      "cve": "CVE-2026-89710",
      "id": "CVE-2026-89710",
      "initial_release_date": "2026-09-11T19:46:25.534000+00:00",
      "product_status:known_affected": "2",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux Kernel: NFSv4.1 memory leak can lead to Denial of Service",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89710.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-12T16:23:11Z",
      "cve": "CVE-2026-89710",
      "id": "CVE-2026-89710",
      "initial_release_date": "2026-09-12T16:23:11Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-89710",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-89710.json",
      "version": "2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.