---
id: CVE-2026-89680
title: 'nfsd: fix nfsd_file leak on inter-server COPY setup failure'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  nfsd: fix nfsd_file leak on inter-server COPY setup failure

  When nfsd4_setup_inter_ssc() fails, nfsd4_copy() returns
  nfserr_offload_denied directly, bypassing the out:…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-911
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= ce0887ac96d35c7105090e166bb0807dc0a0e838 <
    ab949252fdf102ae74329a0caa7995a849d0dafa
  - >-
    Linux >= ce0887ac96d35c7105090e166bb0807dc0a0e838 <
    1a6a41b848455bf6ba2c9da2dfb0730e608ce7ab
  - >-
    Linux >= ce0887ac96d35c7105090e166bb0807dc0a0e838 <
    424d5c95108a4809b832cb0a312c61de4aec0078
  - >-
    Linux >= ce0887ac96d35c7105090e166bb0807dc0a0e838 <
    6ed8d6de7ec90c4ba84eb82673058f506e5777fd
  - >-
    Linux >= ce0887ac96d35c7105090e166bb0807dc0a0e838 <
    88a76145451d703eedd867b5989bf73d17340399
  - Linux 5.6
published: '2026-09-11'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T12:48:17.853Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-89680'
references:
  - url: 'https://git.kernel.org/stable/c/ab949252fdf102ae74329a0caa7995a849d0dafa'
  - url: 'https://git.kernel.org/stable/c/1a6a41b848455bf6ba2c9da2dfb0730e608ce7ab'
  - url: 'https://git.kernel.org/stable/c/424d5c95108a4809b832cb0a312c61de4aec0078'
  - url: 'https://git.kernel.org/stable/c/6ed8d6de7ec90c4ba84eb82673058f506e5777fd'
  - url: 'https://git.kernel.org/stable/c/88a76145451d703eedd867b5989bf73d17340399'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89680.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89680'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532302'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89680'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89680'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89680.mbox
tags:
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00651
epssPercentile: 0.50978
scores:
  cna: 7.5
  vendor: 7
ingestedAt: '2026-09-14T15:23:07.473Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

nfsd: fix nfsd_file leak on inter-server COPY setup failure

When nfsd4_setup_inter_ssc() fails, nfsd4_copy() returns
nfserr_offload_denied directly, bypassing the out: label where
release_copy_files() would drop the nf_dst reference taken by
nfs4_preprocess_stateid_op(). Each failed inter-server COPY
leaks one nfsd_file, pinning file/inode/dentry/vfsmount.

Fix by setting status and jumping to out: instead of returning
directly.

## Affected

- `Linux >= ce0887ac96d35c7105090e166bb0807dc0a0e838 < ab949252fdf102ae74329a0caa7995a849d0dafa`
- `Linux >= ce0887ac96d35c7105090e166bb0807dc0a0e838 < 1a6a41b848455bf6ba2c9da2dfb0730e608ce7ab`
- `Linux >= ce0887ac96d35c7105090e166bb0807dc0a0e838 < 424d5c95108a4809b832cb0a312c61de4aec0078`
- `Linux >= ce0887ac96d35c7105090e166bb0807dc0a0e838 < 6ed8d6de7ec90c4ba84eb82673058f506e5777fd`
- `Linux >= ce0887ac96d35c7105090e166bb0807dc0a0e838 < 88a76145451d703eedd867b5989bf73d17340399`
- `Linux 5.6`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89680.json)