CVE-2026-55781 NanaZip: Unbounded memory allocation (DoS) in NanaZip UFS parser via unvalidated fs_bsize/fs_fsize superblock fields

NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.0, NanaZip's UFS and FFS image handler in NanaZip.Codecs.Archive.Ufs.cpp validates the superblock block size only against the MINBSIZE lower bound and does not validate the fsfsize fragment size, allowin...

CVE-2026-55781 NanaZip: Unbounded memory allocation (DoS) in NanaZip UFS parser via unvalidated fs_bsize/fs_fsize superblock fields

NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.0, NanaZip's UFS and FFS image handler in NanaZip.Codecs.Archive.Ufs.cpp validates the superblock block size only against the MINBSIZE lower bound and does not validate the fsfsize fragment size, allowin...

CVE-2026-44215 NanaZip: Heap out-of-bounds write in NanaZip UFS directory parser

NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a one-byte heap out-of-bounds null write exists in the UFS/UFS2 filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted UFS filesystem image. The attacker controls the byte offset of th...

CVE-2026-42445

NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, an uncontrolled recursion vulnerability exists in the UFS/UFS2 filesystem image parser in NanaZip. The function GetAllPaths recurses into subdirectories without any depth limit or visited-inode tracking. A crafted UFS...

CVE-2026-42445

NanaZip 5.0.1252.0–before 6.0.1698.0 contains an uncontrolled recursion vulnerability in the UFS/UFS2 filesystem image parser. The function GetAllPaths recurses into subdirectories without a depth limit or visited-inode tracking, allowing a crafted UFS image with a very deep directory tree or an ...

CVE-2026-42442 NanaZip: Null-pointer dereference in NanaZip UFS parser when root inode is a symlink

NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a null-pointer dereference exists in the UFS/UFS2 filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted UFS image where the root inode inode 2 is set to IFLNK symlink instead of IFDIR...

CVE-2026-42442 NanaZip: Null-pointer dereference in NanaZip UFS parser when root inode is a symlink

NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a null-pointer dereference exists in the UFS/UFS2 filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted UFS image where the root inode inode 2 is set to IFLNK symlink instead of IFDIR...

CVE-2026-42442

Summary: CVE-2026-42442 affects NanaZip, an open source file archive, in versions 5.0.1252.0 through before 6.0.1698.0. A null‑pointer dereference occurs in the UFS/UFS2 filesystem image parser when opening a crafted UFS image whose root inode (inode 2) is set to IFLNK (symlink) instead of IFDIR ...

CVE-2026-27711

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...

PT-2026-22045

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...