{"id":"CVE-2026-47222","state":"PUBLISHED","title":"NanaZip: Heap out-of-bounds read in NanaZip AVB property descriptor parser via unsigned integer underflow","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.","publishedAt":"2026-06-12T16:56:47.501Z","updatedAt":"2026-06-12T17:16:04.731Z","severity":{"score":5.4,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["M2Team NanaZip"],"affected":[{"vendor":"M2Team","product":"NanaZip","versions":[{"version":">= 3.0.1000.0, < 6.0.1698.0","status":"affected"}]}],"references":["https://github.com/M2Team/NanaZip/security/advisories/GHSA-mqqj-crf3-6q37"],"weaknesses":["CWE-125","CWE-191"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/47xxx/CVE-2026-47222.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-47222","state":"PUBLISHED","datePublished":"2026-06-12T16:56:47.501Z","dateUpdated":"2026-06-12T17:16:04.731Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-18T22:25:21.258Z"},"containers":{"cna":{"title":"NanaZip: Heap out-of-bounds read in NanaZip AVB property descriptor parser via unsigned integer underflow","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"M2Team","product":"NanaZip","versions":[{"version":">= 3.0.1000.0, < 6.0.1698.0","status":"affected"}]}],"references":[{"url":"https://github.com/M2Team/NanaZip/security/advisories/GHSA-mqqj-crf3-6q37","name":"https://github.com/M2Team/NanaZip/security/advisories/GHSA-mqqj-crf3-6q37","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","description":"CWE-125: Out-of-bounds Read","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-191","lang":"en","description":"CWE-191: Integer Underflow (Wrap or Wraparound)","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-12T16:56:47.501Z"},"source":{"advisory":"GHSA-mqqj-crf3-6q37","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/M2Team/NanaZip/security/advisories/GHSA-mqqj-crf3-6q37","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-12T17:15:21.985742Z","id":"CVE-2026-47222","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-12T17:16:04.731Z"}}]}}}