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.
Metrics
Affected Vendors & Products
References
History
Mon, 18 May 2026 13:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:m2team:nanazip:*:*:*:*:*:*:*:* |
Thu, 14 May 2026 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Tue, 12 May 2026 22:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
M2team
M2team nanazip |
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| Vendors & Products |
M2team
M2team nanazip |
Tue, 12 May 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | NanaZip: Unbounded resource consumption in NanaZip littlefs parser via attacker-controlled BlockCount | |
| Weaknesses | CWE-770 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-05-12T19:22:09.813Z
Updated: 2026-05-14T19:17:13.466Z
Reserved: 2026-04-27T13:55:58.692Z
Link: CVE-2026-42444
Updated: 2026-05-14T19:15:59.164Z
Status : Analyzed
Published: 2026-05-12T20:16:41.653
Modified: 2026-05-18T14:17:41.217
Link: CVE-2026-42444
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