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CVE-2026-47222

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 cra
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d0cae148e4779e647a68181211abb798af88e7aeed0e6271d76e33dfcb7fe7bc
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-125","description":"CWE-125: Out-of-bounds Read","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6c022af804f9e52dd66bcdc675c8f687a5c1b13a1251ca70d71bf00f06740383 · sha256:5fab41b62bcdaaa7… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-191","description":"CWE-191: Integer Underflow (Wrap or Wraparound)","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6c022af804f9e52dd66bcdc675c8f687a5c1b13a1251ca70d71bf00f06740383 · sha256:5fab41b62bcdaaa7… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"NanaZip","vendor":"M2Team","versions":[{"status":"affected","version":">= 3.0.1000.0, < 6.0.1698.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:6c022af804f9e52dd66bcdc675c8f687a5c1b13a1251ca70d71bf00f06740383 · sha256:5fab41b62bcdaaa7… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"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"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6c022af804f9e52dd66bcdc675c8f687a5c1b13a1251ca70d71bf00f06740383 · sha256:5fab41b62bcdaaa7… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-125","description":"CWE-125: Out-of-bounds Read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6c022af804f9e52dd66bcdc675c8f687a5c1b13a1251ca70d71bf00f06740383 · sha256:5fab41b62bcdaaa7… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-191","description":"CWE-191: Integer Underflow (Wrap or Wraparound)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6c022af804f9e52dd66bcdc675c8f687a5c1b13a1251ca70d71bf00f06740383 · sha256:5fab41b62bcdaaa7… · /containers/cna/problemTypes/1/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/M2Team/NanaZip/security/advisories/GHSA-mqqj-crf3-6q37"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6c022af804f9e52dd66bcdc675c8f687a5c1b13a1251ca70d71bf00f06740383 · sha256:5fab41b62bcdaaa7… · /containers/adp/0/references/0
{"name":"https://github.com/M2Team/NanaZip/security/advisories/GHSA-mqqj-crf3-6q37","tags":["x_refsource_CONFIRM"],"url":"https://github.com/M2Team/NanaZip/security/advisories/GHSA-mqqj-crf3-6q37"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6c022af804f9e52dd66bcdc675c8f687a5c1b13a1251ca70d71bf00f06740383 · sha256:5fab41b62bcdaaa7… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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