CVE-2026-47224: NanaZip: Heap buffer-overflow read in NanaZip LVM metadata CRC check

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-12 · updated 2026-10-26
Weakness: CWE-125

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 buffer-overflow read exists in the LVM2 physical-volume metadata parser in NanaZip (via the upstream 7-Zip LvmHandler). The vulnerability is triggered when opening a crafted LVM disk image. This issue has been patched in stable version 6.0.1698.0 and preview version 6.5.1742.0.

Affected products

M2Team NanaZip: from 3.0.1000.0, < 6.0.1698.0

References

https://github.com/M2Team/NanaZip/security/advisories/GHSA-qcgf-c2vp-fwjr

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