CVE-2026-47223 | THREATINT

Description

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.

PUBLISHED Reserved 2026-05-18 | Published 2026-06-12 | Updated 2026-06-13 | Assigner GitHub_M

MEDIUM: 5.4CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L

Problem types

CWE-125: Out-of-bounds Read

CWE-190: Integer Overflow or Wraparound

Product status

>= 3.0.1000.0, < 6.0.1698.0

affected

References

github.com/...anaZip/security/advisories/GHSA-qhc5-mh6j-4g75 exploit

github.com/...anaZip/security/advisories/GHSA-qhc5-mh6j-4g75

cve.org (CVE-2026-47223)

nvd.nist.gov (CVE-2026-47223)

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