Vulnerability Description
NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a null-pointer dereference exists in the UFS/UFS2 filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted UFS image where the root inode (inode 2) is set to IFLNK (symlink) instead of IFDIR (directory). The parser unconditionally treats the root inode as a directory without checking its type, and when the symlink has an embedded target (small di_size), the directory data buffer is zero-length, causing a null-pointer dereference on the first read. This vulnerability is fixed in 6.0.1698.0.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| M2Team | Nanazip | >= 5.0.1250.0, < 6.0.1698.0 |
Related Weaknesses (CWE)
References
- https://github.com/M2Team/NanaZip/security/advisories/GHSA-8r4x-fx3w-ph77MitigationVendor Advisory
FAQ
What is CVE-2026-42442?
CVE-2026-42442 is a vulnerability with a CVSS score of 3.3 (LOW). NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a null-pointer dereference exists in the UFS/UFS2 filesystem image parser in NanaZip. The vulnerability is triggered when ...
How severe is CVE-2026-42442?
CVE-2026-42442 has been rated LOW with a CVSS base score of 3.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-42442?
Check the references section above for vendor advisories and patch information. Affected products include: M2Team Nanazip.