Multiple vulnerabilities in Linux kernel nilfs2 filesystem driver

Published: 2022-11-14

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2022-3621 CVE-2022-3646
CWE-ID	CWE-476
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Linux kernel Operating systems & Components / Operating system
Vendor	Linux Foundation

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) NULL pointer dereference

EUVDB-ID: #VU69300

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-3621

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in the nilfs2 filesystem driver within the nilfs_bmap_lookup_at_level() function in fs/nilfs2/inode.c in Linux kernel. A remote attacker can trick the victim into mounting a specially crafted image and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

External links

http://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=21a87d88c2253350e115029f14fe2a10a7e6c856
http://lists.debian.org/debian-lts-announce/2022/11/msg00001.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) NULL pointer dereference

EUVDB-ID: #VU69299