CVE-2026-42442: GHSL-2026-124_GHSL-2026-134: Memory corruption, information disclosure, and denial of service in NanaZip - CVE-2026-54616, CVE-2026-44215, CVE-2026-47222, CVE-2026-47223, CVE-2026-42446, CVE-2026-47224, CVE-2026-42442, CVE-2026-42443, CVE-2026-42445, CVE-2026-42355, CVE-2026-42444
NanaZip contains memory-safety, parsing, and resource-exhaustion vulnerabilities that can cause memory corruption, information disclosure, or denial of service.
Other sources
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 disize), 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.
— MITRE
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
NanaZipto a version that resolves this vulnerability.Fixed in 6.0.1698.0
Event History
Frequently Asked Questions
What is the severity of CVE-2026-42442?
CVE-2026-42442 is classified as a high-severity vulnerability due to its null-pointer dereference issue.
How do I fix CVE-2026-42442?
To mitigate CVE-2026-42442, update NanaZip to version 6.0.1698.0 or later.
What products are affected by CVE-2026-42442?
CVE-2026-42442 affects NanaZip versions from 5.0.1252.0 up to but not including 6.0.1698.0.
What type of issue is CVE-2026-42442?
CVE-2026-42442 is a null-pointer dereference vulnerability occurring in the UFS parser of NanaZip.
In what scenarios can CVE-2026-42442 be exploited?
CVE-2026-42442 can be exploited when a crafted UFS/UFS2 filesystem image is opened while the root inode is a symlink.