NULL pointer dereference in libetpan - CVE-2022-4121
Published: September 9, 2025
Vulnerability identifier: #VU114997
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2022-4121
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error within the mailimap_mailbox_data_status_free() function in low-level/imap/mailimap_types.c when handling the IMAP STATUS command. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.
Affected software
libetpan
Ubuntu
Fedora
libetpan (Ubuntu package)
libetpan
Ubuntu
Fedora
libetpan (Ubuntu package)
libetpan
How to mitigate CVE-2022-4121
Install update from vendor's website.
libetpan (Ubuntu package) - addressed in versions 1.6-1ubuntu0.1+esm1, 1.8.0-1ubuntu0.1~esm1, 1.9.4-2ubuntu0.1~esm1, 1.9.4-3+deb11u1build0.22.04.1
libetpan - addressed in versions 1.9.4-9.fc35, 1.9.4-9.fc36, 1.9.4-9.fc37
libetpan - addressed in versions 1.9.4-9.fc35, 1.9.4-9.fc36, 1.9.4-9.fc37