CVE-2026-90418

kernel: nilfs2: fix BUG in nilfs_copy_dirty_pages() on dirty state mismatch

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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 20, 2026

Description

A flaw was found in nilfs2, a file system in the Linux kernel. This vulnerability occurs when a dirty page unexpectedly loses its dirty status during a copy operation, particularly after the filesystem detects metadata corruption and transitions to read-only mode. An attacker could potentially trigger a kernel bug, leading to a system crash and a denial of service.

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-367 · Time-of-check Time-of-use (TOCTOU) Race Condition