CVE-2026-47222 Details
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). An unsigned integer underflow in a bounds check allows an attacker-controlled value_num_bytes field to pass validation, causing AddNameToString to read up to ~4 GiB past the end of a 64 KiB heap buffer. This causes a deterministic crash (denial of service) when opening a crafted .avb or .img file. This issue has been patched in stable version 6.0.1698.0 and preview version 6.5.1742.0.
A heap out-of-bounds read vulnerability has been identified in NanaZip versions 3.0.1000.0 prior to 6.0.1698.0. The issue arises in the Android Verified Boot (AVB) vbmeta image parser, where an unsigned integer underflow in a bounds check allows an attacker-controlled value to bypass validation. This flaw causes the parser to read approximately 4 GiB beyond the end of a 64 KiB heap buffer, leading to a deterministic crash when opening a crafted .avb or .img file. The vulnerability has been patched in NanaZip stable version 6.0.1698.0 and preview version 6.5.1742.0.
Users can update to NanaZip stable version 6.0.1698.0 or preview version 6.5.1742.0, both of which include the patch for this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 12, 2026CISA-ADP
Assessed Jun 12, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/M2Team/NanaZip/security/advisories/GHSA-mqqj-crf3-6q37 | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/M2Team/NanaZip/security/advisories/GHSA-mqqj-crf3-6q37 | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-125 | Out-of-bounds Read | [email protected] |
| CWE-191 | Integer Underflow (Wrap or Wraparound) | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| M2Team NanaZip | >= 3.0.1000.0 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 12, 2026 | CVE Modified | CISA-ADP |
| Jun 12, 2026 | New CVE Received | [email protected] |