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CVE PROGRAM SOURCE RECORD5.1 Medium

CVE-2026-27711

NanaZip UFS Archive Parser Memory Corruption via Unvalidated Directory Record Length

Description

NanaZip is an open source file archive. Starting in version 5.0.1252.0 and prior to versions 6.0.1638.0 and 6.5.1638.0, a memory corruption vulnerability in NanaZip’s UFS parser allows a crafted `.ufs/.ufs2/.img` file to trigger out-of-bounds memory access during archive open/listing. The bug is reachable via normal user file-open flow and can cause process crash, hang, and potentially exploitable heap corruption. Versions 6.0.1638.0 and 6.5.1638.0 fix the issue.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

M2Team NanaZip

  • >= 5.0.1252.0, < 6.0.1638.0affected
  • >= 6.1, < 6.5.1638.0affected

References