CVE-2026-42443

LOW

NanaZip: Integer divide-by-zero in NanaZip UFS inode offset calculation

Title source: cna
STIX 2.1

Description

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 fs_ipg (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.

References (1)

Core 1
Core References

Scores

CVSS v3 3.3
EPSS 0.0011
EPSS Percentile 1.6%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-369
Status published
Products (2)
m2team/nanazip 5.0.1252.0 - 6.0.1698.0
M2Team/NanaZip >= 5.0.1250.0, < 6.0.1698.0
Published May 12, 2026
Tracked Since May 13, 2026