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CVE-2026-45983

kernel: nfsd: never defer requests during idmap lookup

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Severity

Moderate

Red Hat Product Security

7

CVSS 3.1

Review impact separately from score.

Published · May 27, 2026

Updated · June 28, 2026

Description

A flaw was found in the Linux kernel's Network File System version 4 (NFSv4) daemon (nfsd). When processing NFSv4 requests, delayed responses from idmap lookups can cause requests to be dropped. This issue prevents the session slot from being properly cleared, leading to subsequent client requests failing with an NFSERR_JUKEBOX error. A remote attacker could exploit this to cause a Denial of Service (DoS) for affected NFSv4 clients.

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