CVE-2022-3646

kernel: nilfs2: memory leak in nilfs_attach_log_writer in fs/nilfs2/segment.c

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Severity

Moderate

Red Hat Product Security

4.3

CVSS 3.1

Review impact separately from score.

Published · October 7, 2022

Updated · October 15, 2026

Description

A flaw was found in the NILFS2 file system implementation in the Linux kernel. If nilfs_attach_log_writer() failed to create a log writer thread, it free'd a data structure of the log writer without any cleanup, causing a leak of struct nilfs_root. A user permitted to mount arbitrary file system images could use this flaw to cause a denial of service (resource exhaustion).

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 · 4.3
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CWE-772 · Missing Release of Resource after Effective Lifetime