---
id: CVE-2026-89703
title: >-
  kernel: nfsd: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations
  (CVE-2026-89703)
summary: >-
  A flaw was found in the `nfsd` component of the Linux kernel. The
  `nfsd4_drop_revoked_stid()` function, which handles admin-revoked delegations,
  fails to correctly set a status flag before releasing a lock. This oversight
  can lead to a use…
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: vendor
cwe: CWE-825
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 6
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-09-11'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T15:02:34+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89703.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89703.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89703'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532470'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89703'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89703'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89703.mbox
  - url: 'https://git.kernel.org/stable/c/1e4795766719ffd74b8cf0f2fde4a1350f8326bf'
  - url: 'https://git.kernel.org/stable/c/650d370cfbc66a96dd14d517bd704689b5bda4e5'
  - url: 'https://git.kernel.org/stable/c/a6d89032e5c6620d5bb44582a72555ce07bf1c2e'
  - url: 'https://git.kernel.org/stable/c/d832a0587528853d45481d1faf75d4b5d062adaf'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.00652
epssPercentile: 0.4903
scores:
  vendor: 4.4
  cna: 9.8
ingestedAt: '2026-09-14T15:23:07.472Z'
---

## Overview

A flaw was found in the `nfsd` component of the Linux kernel. The `nfsd4_drop_revoked_stid()` function, which handles admin-revoked delegations, fails to correctly set a status flag before releasing a lock. This oversight can lead to a use-after-free condition when a freed delegation is incorrectly added to a list, potentially allowing an attacker to cause a denial of service or execute arbitrary code.

## 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 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89703.json)

**kernel: nfsd: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-15.

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

Not affected:

- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat OpenShift Container Platform 4

## Remediation

Out of support scope