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CVE-2026-90236

kernel: NFSD: Release the export reference when reaping open stateids

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Severity

Moderate

Red Hat Product Security

7

CVSS 3.1

Review impact separately from score.

Published · September 17, 2026

Updated · October 6, 2026

Description

A flaw was found in the Network File System Daemon (NFSD) of the Linux kernel. This vulnerability occurs due to an improper handling of export references when reaping open state IDs. An unreleased reference can pin an export, preventing the file system from being unmounted. This could allow a local attacker to cause a Denial of Service (DoS) by blocking unmount operations for the lifetime of the state ID.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-772 · Missing Release of Resource after Effective Lifetime