CVE-2026-42442
Last modified
CVE-2026-42442 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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. EPSS estimates a 0.11% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| M2team | Nanazip | >= 5.0.1250.0, < 6.0.1698.0 |
References
- https://github.com/M2Team/NanaZip/security/advisories/GHSA-8r4x-fx3w-ph77Mitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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