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Vulnerability record · CVE-2022-4121 · published 17 January 2023

CVE-2022-4121: Libetpan project libetpan null pointer dereference vulnerability

LLibetpan Project · Libetpan

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.

5.5 CVSS 3.1 Medium EPSS 0.54% · top 56.6% CWE-476 · NULL pointer dereference
5.5CVSS 3.1 base score
0.54%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/dinhvh/libetpan/commit/5c9eb6b6ba64c4eb927d7a902317410181aacbba PatchThird Party Advisory
https://github.com/dinhvh/libetpan/issues/420 ExploitIssue TrackingPatchThird Party Advisory
https://github.com/dinhvh/libetpan/commit/5c9eb6b6ba64c4eb927d7a902317410181aacbba PatchThird Party Advisory
https://github.com/dinhvh/libetpan/issues/420 ExploitIssue TrackingPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2025/07/msg00018.html

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2017-8825Libetpan project libetpan null pointer dereference vulnerabilityA null dereference vulnerability has been found in the MIME handling component of LibEtPan before 1.8, as used in MailCore and MailCore 2. A crash ca…EPSS 1.8%7.4CVE-2020-15953Libetpan project libetpan injection vulnerabilityLibEtPan through 1.9.4, as used in MailCore 2 through 0.6.3 and other products, has a STARTTLS buffering issue that affects IMAP, SMTP, and POP3. Whe…EPSS 2.4%6.2CVE-2026-21525Windows Remote Access Connection Manager null pointer dereference DoSWindows Remote Access Connection Manager contains a null pointer dereference (CWE-476) that lets an unauthorized attacker deny service locally. The f…KEVEPSS 4.8%analysed

Source: NIST National Vulnerability Database (record CVE-2022-4121), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.