CVE-2026-42442 — NanaZip: Null-pointer dereference in NanaZip UFS parser when root inode is a symlink

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
M2Team / NanaZip	affected >= 5.0.1250.0, < 6.0.1698.0

CWE

CWE-476

References

https://github.com/M2Team/NanaZip/security/advisories/GHSA-8r4x-fx3w-ph77

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.