CVE-2026-90149

kernel: NFSv4/flexfiles: fix NULL dereference for NFSv4.0 data servers

Loading…

Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · September 17, 2026

Updated · October 30, 2026

Description

A flaw was found in the Linux kernel's NFSv4 (Network File System version 4) flexfiles implementation. When an NFSv4.0 data server is used, two code paths incorrectly assume the client has a session, leading to a NULL pointer dereference. This issue can cause the kernel to crash, resulting in a Denial of Service (DoS) for affected systems.

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