CVE-2026-42443

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.

PUBLISHED Reserved 2026-04-27 | Published 2026-05-12 | Updated 2026-05-12 | Assigner GitHub_M

Problem types

CWE-369: Divide By Zero

Product status

References

github.com/...anaZip/security/advisories/GHSA-3x2h-gqqw-g3gm

cve.org (CVE-2026-42443)

nvd.nist.gov (CVE-2026-42443)

Download JSON