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Description

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.

PUBLISHED Reserved 2026-04-27 | Published 2026-05-12 | Updated 2026-05-14 | Assigner GitHub_M




LOW: 3.3CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Problem types

CWE-770: Allocation of Resources Without Limits or Throttling

Product status

>= 5.0.1250.0, < 6.0.1698.0
affected

References

github.com/...anaZip/security/advisories/GHSA-7hqh-mq57-wjmq exploit

github.com/...anaZip/security/advisories/GHSA-7hqh-mq57-wjmq

cve.org (CVE-2026-42444)

nvd.nist.gov (CVE-2026-42444)

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