CVE-2026-44215

MEDIUM

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

Title source: cna
STIX 2.1

Description

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.

References (1)

Core 1
Core References

Scores

CVSS v3 4.4
EPSS 0.0022
EPSS Percentile 12.0%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-787
Status published
Products (2)
m2team/nanazip 5.0.1252.0 - 6.0.1698.0
M2Team/NanaZip >= 5.0.1250.0, < 6.0.1698.0
Published May 12, 2026
Tracked Since May 13, 2026