What is CVE-2022-4121?

CVE-2022-4121 is a medium-severity vulnerability in Libetpan Project, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2023-01-17.

How severe is CVE-2022-4121?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2022-4121 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

NULL pointer dereference in Libetpan Project

CVE-2022-4121

In libetpan a null pointer dereference in mailimap_mailbox_data_status_free in low-level/imap/mailimap_types.c was found that could lead to a remote denial of service or other potential consequences.

Published 2023-01-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.005 (43.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Libetpan Project
Libetpan

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

Public proof-of-concept exploits

w4zu/Debian_

References

github.com/dinhvh/libetpan/issues/420 (Exploit, Patch, Third Party Advisory, Issue Tracking)
github.com/dinhvh/libetpan/commit/5c9eb6b6ba64c4eb927d7a902317410181aacbba (Patch, Third Party Advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2022-4121?: CVE-2022-4121 is a medium-severity vulnerability in Libetpan Project, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2023-01-17.
How severe is CVE-2022-4121?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2022-4121 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.