CVE-2026-42443: NanaZip: Integer divide-by-zero in NanaZip UFS inode offset calculation
NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, an integer divide-by-zero exists in the UFS/UFS2 filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted UFS image where the superblock field fsipg (inodes per cylinder group) is set to zero. The parser uses this attacker-controlled value as a divisor without validation, causing an immediate hardware trap and process crash. This vulnerability is fixed in 6.0.1698.0.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-42443?
CVE-2026-42443 is classified as a high severity vulnerability due to its potential for causing application crashes.
How do I fix CVE-2026-42443?
To fix CVE-2026-42443, update NanaZip to version 6.0.1698.0 or later.
What impact does CVE-2026-42443 have on NanaZip?
CVE-2026-42443 can lead to an integer divide-by-zero error when processing crafted UFS images, potentially crashing the application.
Which versions of NanaZip are affected by CVE-2026-42443?
CVE-2026-42443 affects NanaZip versions from 5.0.1252.0 up to, but not including, 6.0.1698.0.
Can CVE-2026-42443 be exploited remotely?
CVE-2026-42443 can be exploited if an attacker provides a malicious UFS image to the affected NanaZip version.