CVE-2026-47222: GHSL-2026-124_GHSL-2026-134: Memory corruption, information disclosure, and denial of service in NanaZip - CVE-2026-54616, CVE-2026-44215, CVE-2026-47222, CVE-2026-47223, CVE-2026-42446, CVE-2026-47224, CVE-2026-42442, CVE-2026-42443, CVE-2026-42445, CVE-2026-42355, CVE-2026-42444
NanaZip contains memory-safety, parsing, and resource-exhaustion vulnerabilities that can cause memory corruption, information disclosure, or denial of service.
Other sources
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 valuenumbytes 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.
— MITRE
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
NanaZipto a version that resolves this vulnerability.Fixed in 6.0.1698.0
Event History
Frequently Asked Questions
What is the severity of CVE-2026-47222?
The severity of CVE-2026-47222 is medium with a score of 5.4.
How do I fix CVE-2026-47222?
To fix CVE-2026-47222, update NanaZip to version 6.0.1698.0 or later.
What type of vulnerability is CVE-2026-47222?
CVE-2026-47222 is categorized as a heap out-of-bounds read caused by an integer underflow.
Which versions of NanaZip are affected by CVE-2026-47222?
NanaZip versions from 3.0.1000.0 to before 6.0.1698.0 are affected by CVE-2026-47222.
What impact does CVE-2026-47222 have on users?
CVE-2026-47222 may allow attackers to read sensitive data from memory via the AVB property descriptor parser.