CVE-2026-44215 MEDIUM

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

Vendor M2Team
Product NanaZip
Weakness CWE-787
Published May 12, 2026
Last update May 13, 2026
View on NVD All CVEs

CVSS base score

4.4/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

What the vulnerability does

01Description

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 the write within a ~254-byte window past the heap allocation boundary. This vulnerability is fixed in 6.0.1698.0.

Key dates

02Disclosure timeline

May 12, 2026 CVE published
May 13, 2026 Record updated