CVE-2022-3621

kernel: nilfs2: NULL pointer dereference in nilfs_bmap_lookup_at_level in fs/nilfs2/inode.c

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Severity

Moderate

Red Hat Product Security

6.5

CVSS 3.1

Review impact separately from score.

Published · September 29, 2022

Updated · October 15, 2026

Description

A flaw was found in the NILFS2 file system implementation in the Linux kernel. If the i_mode field in inode of the metadata files is corrupted on the disk, it can cause the initialization of the bmap structure not being called, resulting in a NULL pointer dereference at nilfs_bmap_lookup_at_level. A user permitted to mount arbitrary file system images could use this flaw to cause a denial of service.

Statement

Red Hat Enterprise Linux is not affected by this flaw as NILFS2 file system support (CONFIG_NILFS2_FS) is not enabled in any current shipping kernels.

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 · 6.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-476 · NULL Pointer Dereference