PT-2026-48944 · M2Team · Nanazip

Published 2026-06-12 · Updated 2026-06-12 · CVE-2026-47223

Mitre

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L

NanaZip is the 7-Zip derivative intended for the modern Windows experience. From version 3.0.1000.0 to before version 6.0.1698.0, a heap out-of-bounds read exists in the Android Verified Boot (AVB) vbmeta image parser in NanaZip (via the upstream 7-Zip AvbHandler). A 32-bit unsigned integer overflow in the bounds check pos + ht.salt len > descSize allows an attacker-controlled salt len field to bypass validation, causing CByteBuffer::CopyFrom to memcpy up to ~4 GiB past the end of a 64. This issue has been patched in stable version 6.0.1698.0 and preview version 6.5.1742.0.

Fix

Integer Overflow

Out of bounds Read

Weakness Enumeration

CWE-190

CWE-125

Related Identifiers

CVE-2026-47223

Affected Products

Nanazip

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-47223 · Security Note
• https://github.com/M2Team/NanaZip/security/advisories/GHSA-qhc5-mh6j-4g75 · Note