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CVE-2026-90148

kernel: NFSv4: Fix incorrect argument passed to nfs4_delete_lease() in nfs4_add_lease()

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · September 17, 2026

Updated · October 13, 2026

Description

A flaw was found in the Linux kernel's NFSv4 component. When the nfs4_add_lease() function races with a delegation return, it can pass an incorrect, potentially null, argument to nfs4_delete_lease(). This incorrect argument eventually leads to a null pointer dereference, which could allow a local attacker to cause a system crash, resulting in a Denial of Service (DoS).

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 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-476 · NULL Pointer Dereference