PT-2026-40356 · Nanazip · Nanazip

Published 2026-05-12 · Updated 2026-05-18 · CVE-2026-42442

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions NanaZip versions 5.0.1252.0 through 6.0.1697.0

Description A null-pointer dereference exists in the UFS/UFS2 filesystem image parser. This occurs when opening a specially crafted UFS image where the root inode (inode 2) is set to IFLNK (symlink) instead of IFDIR (directory). The parser treats the root inode as a directory without verifying its type. If the symlink contains an embedded target (small di size), the directory data buffer is created with zero length, leading to a null-pointer dereference during the first read operation.

Recommendations Update to version 6.0.1698.0.

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2026-42442

Affected Products

Nanazip

References · 4

• https://github.com/M2Team/NanaZip/security/advisories/GHSA-8r4x-fx3w-ph77 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-42442 · Security Note
• https://twitter.com/CVEnew/status/2054324088324452639 · Twitter Post
• https://t.me/cveNotify/163851 · Telegram Post