What is CVE-2022-3621?

CVE-2022-3621 is a medium-severity vulnerability in Linux Kernel, classified under Improper Resource Shutdown or Release. CVSS score: 4.3/10. Published 2022-10-20.

How severe is CVE-2022-3621?

Medium severity. CVSS v3 base score is 4.3 out of 10.

NULL pointer dereference in Linux Kernel

CVE-2022-3621

A vulnerability was found in Linux Kernel. It has been classified as problematic. Affected is the function nilfs_bmap_lookup_at_level of the file fs/nilfs2/inode.c of the component nilfs2. The manipulation leads to null pointer dereference. It is possible to launch the attack remotely. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-211920.

Published 2022-10-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.013 (70.0th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 70.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: +0.000

Affected products

Weakness classification (CWE)

References

git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/ (Patch, Mailing List, Vendor Advisory)
vuldb.com/ (Third Party Advisory)
lists.debian.org/debian-lts-announce/2022/11/msg00001.html (mailing-list, Mailing List, Third Party Advisory)
lists.debian.org/debian-lts-announce/2022/12/msg00034.html (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2022-3621?: CVE-2022-3621 is a medium-severity vulnerability in Linux Kernel, classified under Improper Resource Shutdown or Release. CVSS score: 4.3/10. Published 2022-10-20.
How severe is CVE-2022-3621?: Medium severity. CVSS v3 base score is 4.3 out of 10.