Is CVE-2026-42442 actively exploited?

No active exploitation of CVE-2026-42442 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-42442 be exploited remotely?

No. CVE-2026-42442 requires local access to exploit.

What is the CVSS score of CVE-2026-42442?

CVE-2026-42442 has a CVSS score of 5.5 (MEDIUM).

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MEDIUM

CVE-2026-42442

CWE-476Published: May 12, 2026· Updated: May 18, 2026

5.5

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:2.3th

Official 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.

NVD Source

Technical Analysis

CVE-2026-42442 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.