CVE-2026-42444: 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 denial-of-service vulnerability exists in the littlefs filesystem image parser in NanaZip. The handler's Open method reads BlockCount directly from the attacker-controlled superblock without any validation against the actual file size or any upper-bound ceiling, then iterates BlockCount times, allocating a file-path entry per iteration. A crafted 44-byte littlefs image with BlockCount = 0xFFFFFFFF causes ~4 billion heap allocations, exhausting available memory. 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-2026-42444?
CVE-2026-42444 is classified as a denial-of-service vulnerability, which can cause unbounded resource consumption in NanaZip.
How do I fix CVE-2026-42444?
To mitigate CVE-2026-42444, update NanaZip to version 6.0.1698.0 or later.
What versions of NanaZip are affected by CVE-2026-42444?
NanaZip versions from 5.0.1252.0 to before 6.0.1698.0 are affected by CVE-2026-42444.
What components are vulnerable in CVE-2026-42444?
The vulnerability in CVE-2026-42444 exists in the littlefs filesystem image parser's Open method in NanaZip.
Can CVE-2026-42444 lead to system exploitation?
CVE-2026-42444 primarily leads to denial-of-service conditions, but exploitation details would depend on the attacker's control over resource management.